referring now to the drawings , and particularly to fig1 there is shown a front top perspective view of an inflatable jumping toy 100 . the jumping toy 100 is typically employed in an indoor and / or outdoor play area for use by children . the jumping toy 100 is used in a manner similar to that of a trampoline in that it is employed for jumping exercises . in a preferred embodiment , the jumping toy 100 is comprised of durable high molecular weight vinyl construction and includes a vertical retainer wall 102 comprised of a plurality of stacked rings including a top ring 104 , a middle ring 106 and a bottom ring 108 . the stacked rings 104 , 106 and 108 are tubular in shape and are mounted one directly above the other . however , it is understood that the shape of the stacked rings 104 , 106 and 108 is not limited to tubular . further , the stacked rings 104 , 106 and 108 are sealed together as best shown in fig6 - 9 and also in fig2 - 3 in a manner known in the art . a suitable method of sealing is dialectric radio frequency ( rf ) sealing using a die and platen combination ( not shown ). the cross - sectional views of fig8 and 9 clearly indicate the sealed nature of the three stacked rings 104 , 106 and 108 . children use the jumping toy 100 to perform jumping exercises . to this end , a child enters the jumping toy 100 by scaling the retainer wall 102 . once inside the jumping toy 100 , the jumping exercises can be executed upon a bouncing mattress 110 clearly shown in fig1 and 6 - 9 . the function of the retainer wall 102 is two fold . initially , the retainer wall 102 serves as a safety cushion during jumping exercises to protect the child during accidental collisions with the vertical retainer wall 102 . more importantly , the retainer wall 102 is designed to prevent a child from falling out of or being accidentally ejected from the jumping toy . six separate air chambers are built into the preferred embodiment of the inflatable jumping toy 100 of the present invention . three of the six air chambers are provided by the three stacked tubular rings of the vertical retainer wall 102 , e . g ., the top ring 104 , the middle ring 106 and the bottom ring 108 . thus , the retainer wall 102 is comprised of three stacked tubular rings which form three separate air chambers . the remaining three air chambers are provided by a torodial base tube 112 shown in fig1 - 9 , an upper layer 114 of the bouncing mattress 110 shown in fig4 and 6 - 9 and a lower layer 116 of the bouncing mattress 110 shown in fig5 and 6 - 9 . further , each air chamber is fitted with a double - value 118 to retain the air within the respective air chamber as is shown in fig1 - 2 and 4 - 5 . it is noted that each of the six separate air chambers formed within the jumping toy 100 can be inflated with a common toy inflating pump . the vertical retainer wall 102 is mounted upon the torodial base tube 112 as best shown in fig6 - 9 and also in fig2 - 3 . the physical connection between the retainer wall 102 and the torodial base tube 112 is accomplished by utilizing a connection web 120 comprised of durable vinyl construction . the connection web 120 is clearly shown in fig8 and 9 as connecting the bottom stacked ring 108 to the top surface of the torodial base tube 112 . this attachment by connection web 120 can be accomplished in any suitable manner such as by rf sealing so that the vertical retainer wall 102 is rigidly connected to the torodial base tube 112 . in order to prevent water accumulation within the volume bounded by the torodial base tube 112 and the upper layer 114 of the bouncing mattress 110 , drain holes 122 are formed along the retainer wall 102 such as , for example , within the connection web 120 . drain holes 122 are shown formed within the connection web 120 in fig1 - 3 and are also necessary to prevent the jumping toy 100 from being utilized as a pool . it is to be understood that the number and location of drain holes is 122 can be changed . the torodial base tube 112 is a large donut - shaped tubular structure fashioned from heavy duty vinyl construction . the function of the torodial base tube 112 is to serve as the base support structure to provide stability to the jumping toy 100 . the torodial base tube 112 of the preferred embodiment of the present invention inflates to 82 &# 34 ; ( e . g ., to 6 &# 39 ; 10 &# 34 ; or 208 cm ) to provide extra stability to the jumping toy 100 . as can be seen in fig6 - 9 , the torodial base tube 112 is larger than the tubular stacked rings 104 , 106 and 108 . the torodial base tube 112 easily supports the stacked rings 104 , 106 and 108 and extends further outward and inward than the retainer wall 102 as is clearly illustrated in fig8 and 9 . the torodial base tube 112 is open in the center portion thereof which provides the situs of the bouncing mattress 110 and which serves as the floor of the jumping toy 100 . a seating shelf 124 extends from the torodial base tube 112 as shown in fig1 and 4 . while standing on the bouncing mattress 110 within the periphery of the jumping top 100 , it can be seen that the seating shelf 124 extends into the volume encompassed by the torodial base tube 112 . the torodial base tube 112 can be manufactured to include the seating shelf 124 as a portion of the structure thereof . in the alternative , the seating shelf 124 can be manufactured as an extension of the torodial base tube 112 . in either case , the seating shelf 124 is charged with air pressure so that it can be utilized as a resting place for children using the jumping toy 100 . the seating shelf 124 is not shown in fig6 - 9 so that the relationship among the retainer wall 102 , the torodial base tube 112 and the bouncing mattress 110 can be illustrated . the bouncing mattress 110 supports the weight of the children and is the medium that provides energy which assists in propelling the children upward during the jumping exercises . the bouncing mattress 110 comprises two sections or layers , e . g ., the upper layer 114 which serves as a floor for the jumping toy 100 and upon which the children stand and the lower layer 116 which is positioned immediately below the upper layer 114 and contacts the supporting surface ( not shown ) underneath the jumping toy 100 . in the preferred embodiment , the upper layer 114 of the bouncing mattress 110 comprises an i - beam construction as shown best in fig7 and 9 and 4 . however , the lower layer 116 of the bouncing mattress 110 comprises a single x - beam spiral construction as shown best in fig6 - 9 and fig5 . both the i - beam construction and the single x - beam spiral construction are known in the prior art for use in inflatable devices . both the upper layer 114 and the lower layer 116 of the bouncing mattress 110 are bonded together and to the bottom of the torodial base tube 112 as by rf sealing at a connection point 125 as shown in fig6 - 9 . when forming the upper layer 114 of the bouncing mattress 110 , the i - beam construction shown in fig7 and 9 and in fig . 4 is accomplished in the following manner . two flat sheets ( not shown separately ) of an appropriate vinyl material such as , for example , 21 gauge polyvinylchloride , are positioned one on top of the other . a third vinyl member ( not shown separately ) is then fashioned in long strips of approximately 3 &# 34 ; in height , 5 &# 34 ; in width and 48 &# 34 ; in length . the third vinyl member is then positioned in between and rf sealed to each of the two flat vinyl sheets in a press so that the resulting construction resembles an &# 34 ; i - beam &# 34 ; 111 as clearly shown in fig5 and 9 . several i - beams 111 formed in parallel create a plurality of parallel rectangular channels 113 . when the i - beam channels 113 also shown in fig7 and 9 are charged with air , the top and bottom of each channel 113 tends to round out . in the cross - sectional views provided , fig6 and 8 ( taken along line 6 -- 6 of fig1 ) show a side view of the i - beam layer . however , fig7 and 9 ( taken along line 7 -- 7 of fig1 ) show an end view of the i - beam channels 113 . the i - beam construction of the upper layer 114 is shown positioned within the open area of the torodial base tube 112 in fig4 . the i - beam construction is employed for the upper layer 114 of the bouncing mattress 110 because it provides a level surface for children to jump upon , provides a thicker cushion to absorb the impact of the children striking the bouncing mattress 110 , and provides a better distribution of the weight of the children . the i - beam 111 provides a more robust construction because each of the channels 113 are open at the end ( e . g ., not sealed ) and thus are tied together ( see fig7 and 9 ). thus , air can pass around the end of each channel 113 , e . g ., from channel - to - channel , so that the air distribution ( psi ) can be more evenly spread across the channels 113 as a function of the weight load . when correct air pressure is observed in the upper layer 114 of the bouncing mattress 110 , weight applied on one side of the bouncing mattress 110 will cause some deflation on that side while charging the opposite side with more air . when forming the lower layer 116 of the bouncing mattress 110 , the single x - beam spiral construction shown best in fig6 and 9 and in fig5 is accomplished in the following manner . a special die - platen combination is formed in the shape of a spiral . two flat sheets ( not shown separately ) of the 21 gauge polyvinylchloride are positioned one on top of the other . the die - platen combination is used to apply a spiral - shaped rf weld 115 to the two flat sheets to create the single x - beam spiral construction as is clearly shown in fig5 - 9 . a gap 126 is located at the center of a continuous spiral of the single x - beam spiral 117 construction of the lower layer 114 shown in fig5 . the gap 126 serves to provide an opening to enable air to enter and thus inflate the center portion of the continuous spiral 117 . because of the spiral construction , each of a plurality of adjacent air pockets 128 of the sections of the continuous spiral 117 shown in the cross - sectional views of fig6 and 7 are not the same height or size . the single x - beam spiral construction of the lower layer 116 is shown positioned within the open area of the torodial base tube 112 in fig5 . the single x - beam spiral construction is employed for the lower layer 116 of the bouncing mattress 110 because of its strength . this construction is strong because the single spiral rf weld 115 is continuous and does not have multiple ends which are typically the weak point of the weld . thus , the single x - beam spiral construction is ideal for the lower layer 116 of the bouncing mattress 110 to resist wear . consequently , the single continuous spiral 117 supports more weight since the stress is spread more evenly over the continuous rf weld . further , the spiral construction promotes the inherent movement of air through the continuous spiral 117 formed by the welds 115 of the die - platen combination . during use of the inflatable jumping toy 100 , a child is positioned on the bouncing mattress 110 and within the periphery of the torodial base tube 112 and the retainer wall 102 . upon execution of the jumping exercises , the child propels herself upward by applying a force from her legs downward against the bouncing mattress 110 . the child &# 39 ; s body is then lifted into the air and gravity returned to the bouncing mattress 110 . upon striking the bouncing mattress 110 , the upper layer 114 having the i - beam construction absorbs the impact of the child &# 39 ; s weight and dissipates the downward force across the plurality of i - beam channels 113 . those forces not entirely dissipated by the i - beam channels 113 are transferred to the lower layer 116 . the x - beam spiral construction of the lower layer 116 having the continuous spiral 117 ensures easy passage of the air therethrough for supporting the weight of the child . further , the three tubular shaped rings 104 , 106 and 108 and the torodial base tube 112 are arranged to absorb the impact of a child colliding with the retainer wall 102 . likewise , the retainer wall 102 is designed to prevent a child from either falling out of or accidentally being ejected from the jumping toy 100 . the seating shelf 124 can be used to rest once the child completes the jumping exercises . the bouncing mattress 110 of the jumping toy 100 comprises the i - beam constructed upper layer 114 and the single x - beam spiral constructed lower layer 116 . as an alternative , the lower layer 116 can comprise a parallel cross - beam or x - beam construction as shown in fig1 - 14 . a bottom planar view of the jumping toy 100 showing the bottom surface of the torodial base tube 112 and the lower layer 116 of the bouncing mattress 110 is shown in fig1 . in this view , the lower layer 116 comprises the alternative construction having a plurality of x - beam welds 119 shown best in fig1 , 11 , and 13 fashioned in a parallel configuration . in the cross - beam or x - beam construction , two flat sheets ( not shown separately ) of the 21 gauge polyvinylchloride are positioned one on top of the other . using an appropriate die - platen combination , the sheets are welded together to form the plurality of parallel x - beam welds 119 . when the resulting welded sheets are charged with air , the adjacent air pockets 128 have the appearance of a &# 34 ; x &# 34 ; and thus are referred to as a cross - beam or x - beam construction . this feature can clearly be seen in the cross - sectional view of fig1 taken along the line 6 -- 6 of fig1 . fig1 is an enlarged detail view of the right side of fig1 . it can be seen in both fig1 and 13 that the interface between the plurality of adjacent air pockets 128 of the lower layer 116 forms a cross - beam or &# 34 ; x &# 34 ;. the remainder of the construction shown in fig1 - 14 is the same as that shown in fig1 - 9 of the preferred embodiment of the jumping toy 100 . an alternative embodiment of the inflatable jumping toy is now presented in fig1 - 21 and will be identified by the reference number 200 . each element in the alternative embodiment of the jumping toy 200 which corresponds to a duplicate element of the preferred embodiment will be identified by the equivalent number of the 200 series . the construction of the jumping toy 200 is very similar to that of the apparatus disclosed in the preferred embodiment . in particular , the jumping toy 200 includes a vertical retainer wall 202 having a plurality of tubular rings stacked vertically one upon the other as can be seen in fig1 - 17 . additionally , the retainer wall 202 is affixed to a torodial base tube 212 by a connection web 220 as shown in fig1 - 17 and 20 - 21 . the connection web 220 includes a plurality of drain holes 222 as shown in fig1 to prevent the jumping toy 200 from accumulating water . further , mounted within the open center space of the torodial base tube 212 is a bouncing mattress 210 clearly shown in fig1 - 21 . the overall size of the jumping toy 200 is somewhat smaller than that disclosed in the preferred embodiment since it is intended to be used by younger children . however , the retainer wall 202 includes a plurality of five tubular vertically - stacked rings to provide more protection against falling out of or being accidentally ejected from the jumping toy 200 . in addition to the three stacked rings 204 , 206 and 208 corresponding to those of the preferred embodiment , stacked rings 230 and 232 are also included . stacked ring 232 is the top ring of the retainer wall 202 and is oversized in order to provide additional cushioning . the torodial base tube 212 of the jumping toy 200 inflates to a diameter of 55 &# 34 ; ( e . g ., 4 &# 39 ; 7 &# 34 ; or 140 cm ) to provide extra stability as is clearly shown in fig1 - 17 . the diameter of the torodial base tube 212 is greater than the diameter of the oversized stacked ring 232 which can be seen in fig1 - 21 and particularly in fig1 . it is also noted that the jumping toy 200 does not include a seating shelf as does the preferred embodiment . the jumping toy 200 includes eight separate air chambers each with a corresponding double valve 218 . the separate air chambers are located as follows . each of the five vertical - stacked rings 204 , 206 , 208 , 230 and 232 comprise a separate air chamber . also , the torodial based tube 212 and the upper layer 214 and lower layer 216 of the bouncing mattress 210 each include a separate air chamber . the bouncing mattress 210 of the jumping toy 200 comprises the identical construction as that disclosed in fig5 - 9 of the preferred embodiment previously discussed with one exception . the upper layer 214 is comprised of the i - beam construction which is configured and operates in a manner duplicate to that previously described and as disclosed in fig1 and 20 - 21 . the lower layer 216 of the bouncing mattress 210 is comprised of the single x - beam spiral construction previously described and as shown in fig1 - 21 . in addition to the elements recited in the description of the x - beam spiral constructed lower layer 116 shown in fig5 - 9 of the preferred embodiment , the lower layer 216 of the jumping toy 200 includes a center circular seal 234 having a gap 236 formed therein as shown in fig1 . the gap 236 serves to enable air to enter and exhaust from the circular seal 234 . the remainder of the jumping toy 200 is constructed and operates in a manner duplicate to that described in the preferred embodiment of the jumping toy 100 of the present invention . it is noted that each of the embodiments 100 and 200 of the inflatable jumping toy disclosed herein are constructed of durable vinyl . one such vinyl is s - 80 resin which is a high molecular weight polyvinylchloride that is unaffected by oil , grease or the like . this vinyl is highly resistant to damage from abrasion , impact and sunlight and is designed to withstand higher air pressures for ensuring greater rigidity . the embodiments 100 and 200 of the jumping toy can be inflated with a regular toy inflation pump and can be deflated to approximately one cubic foot for convenient storage . the torodial base tube 112 employed in the present invention is used to ensure stability during use of the jumping toy 100 . although not shown in the drawing figs ., the bottom surface of the torodial base tube 112 can include a traction element to improve the grip of the jumping toy 100 to the indoor or outdoor surface upon which the jumping toy 100 is placed . it will be apparent from the foregoing that , while particular forms of the invention have been illustrated and described , various modifications can be made without departing from the spirit and scope of the invention . accordingly , it is not intended that the invention be limited , except as by the appended claims . accordingly ,