fig1 shows a child &# 39 ; s high chair c with a pair of catch tray assemblies 10 , according to a first preferred embodiment of the present invention , supported on opposed left and right sides of the chair c . the chair c comprises a seat structure 12 supported by a support structure 14 . the seat structure 12 comprises a seat 16 and a back 18 , the seat 16 and back 18 disposed at an angle to one another . a pair of l shaped arms 20 are attached to the seat 16 and the back 18 in a well known manner . the arms 20 support a tray table 24 which is securely yet removably selectively engaged with the arms 20 by table latches 26 operatively interconnected between the tray table 24 and the arms 20 . the support structure 14 comprises pairs of front and rear legs 30 and 32 , respectively , secured to the seat 16 . the left legs of front and rear pair of legs , 30 and 32 , are supported against movement relative to the right legs of front and rear pairs of legs , 30 and 32 , by front and rear leg rungs 34 and 35 . similarly , the front legs 30 are supported against movement relative to the rear legs 32 by pairs of upper side rungs 40 and lower side rungs 41 . a foot support 44 is attached to , and is supported by , the front legs 30 substantially perpendicular thereto . each of the catch tray assemblies 10 comprises a catch tray 50 attached to and supported by the support structure 14 through an attaching means 56 , alternatives of which are shown most clearly in fig2 - 4 . the catch tray 50 is shown to be generally oblong with parallel side edges and rounded ends . it is to be understood that the shape depicted in the several drawings is not to be taken as a limitation of the present invention and that other shapes of the catch tray 50 are within the contemplation of the present invention . the catch tray 50 includes a planar tray body 52 having a raised lip 54 extending from the tray body 52 and peripherally disposed about its outer edge . the planar tray body 52 defines an upper catch surface 55 which is supported substantially horizontally when the catch tray assembly 10 is attached to the high chair c . the catch tray 50 is preferably fabricated of a plastic material , however , other materials , including metal , such as aluminum or stainless steel , could be used . it is desirable that the catch tray 50 be fabricated of a material that will not stain and is easily cleaned . the catch tray 50 may be made of a clear material , such as acrylic , or it may be opaque . preferably the material will withstand the effect of ordinary household cleaners and could be fabricated of material suitable for use in a dishwasher so that the catch tray 50 can be inserted into a dishwasher for cleaning . the width of the catch tray 50 is sized so that the catch surface 55 extends about a foot or more to the left and right of the chair c . the length of the catch tray 50 is sized so that the catch surface 55 extends in front of and rearwardly of the front and rear legs , 30 and 32 , respectively , about six to twelve inches . it is to be understood that any practical size of the catch tray 50 is within the contemplation of the present invention . two alternative attaching means 56 are shown in fig2 - 4 . in fig2 and 3 , the attaching means 56 includes spring clamp assemblies 57 attached to a portion of a leg l and operatively interconnected with the catch tray 50 by a t - slot assembly 60 that extends along a lower surface 61 of the catch tray 50 opposite the catch surface 55 . the t - slot assembly 60 comprises opposed z - shaped bars 62 , secured to the lower surface 61 by conventional means including rivets 63 , thereby providing a t - slot 64 defined between the bars 62 . other means for securing the bars 62 to the catch tray 50 are well known in the art and adaptable to the present invention . also , the t - slot 64 may be provided by other means such as by integrally molding the t - slot 64 into the catch tray body 52 in a well known manner . the spring clamp assembly 57 , includes a leg clamp 66 and a t - slider 68 pivotally engaging the leg clamp 66 through a screw clamp 69 . the leg clamp 66 comprises opposed spring steel clamping members 70 . the spring clamping members 70 are bent to provide a generally circular clamping region and divergent leg engaging ears 71 . the nominal , un - sprung , diameter of the clamping region , that is when the spring clamp assembly 57 is not attached to the high chair leg l , is smaller than the anticipated diameter of the high chair leg l to which the spring clamp assembly 57 will be engaged . the t - slider 68 comprises a plate 74 sized to slide freely but remain captive within the t - slot 64 . an engaging flange 75 extends downwardly from the plate 74 outwardly of the opposed bars 62 . an end of the flange 75 opposite the plate 74 is pivotally engaged with ends 76 of the clamping members 70 , opposite the leg engaging ears 71 , by the screw clamp 69 which engages cooperating apertures defined in the flange 75 and the clamping members 70 . the spring clamp assemblies 57 are free to slide in the slot 64 of the t - slot assembly 60 . this allows the spacing between the spring clamping assemblies 57 , two of which are provided for each catch tray assembly 10 , to accommodate the variable spacing between the high chair legs 30 and 32 as the height of the catch tray 10 is selectively adjusted along the legs . the legs of a typical high chair are typically angularly displaced from the vertical which causes the spacing between the legs to vary from the floor to the seat 16 . also , the spacing of the legs 30 and 32 between different manufacturers will most likely vary . the pivotal interconnection of the flange 75 with the clamping member 70 allows the catch tray 50 to be positioned in a horizontal plane even though the legs 30 and 32 are angled from the vertical on most high chairs . the leg clamp 66 is attached to the high chair leg 30 or 32 by first adjusting the spacing between the leg clamps 66 and then engaging the leg engaging ears 71 against the leg at generally the desired height on the leg 30 or 32 . the spring clamp 66 is pushed toward the leg 30 or 32 thereby urging the leg engaging ears 71 and the clamping members 70 apart such that the spring clamp is disposed about the leg 30 or 32 with the leg positioned within the circular clamping region . in this position the clamping members 70 are disposed in compressive engagement with the legs due to the spring tension of the material used to fabricate the clamping members 70 , which is preferable a high tempered steel . the catch tray 50 is then positioned manually generally horizontally and locked by the screw clamp 69 . an alternative embodiment of the catch tray 50 and clamp assembly 57 is shown in fig4 . the clamp assembly 57 is disposed in adjustable engagement with the t - slot 64 of the t - slot assembly 60 which is adapted to and extends along a vertical side edge of the catch tray 50 . in fig4 it will be seen that the clamp assembly 57 is a rigid clamp assembly and provides for no pivotal adjustment of the catch tray 50 . however , the clamp assembly 57 could be provided with a leg clamp 66 and a t - slider 68 , similar to that shown in fig2 and 3 , and as described above , thus providing pivotal adjustment of the catch tray 50 . looking now at fig5 - 7 there is shown a child &# 39 ; s high chair c with catch tray assemblies 50 supported by the support assembly 14 by attaching means 56 which comprises a pair of rung clamp assemblies 80 . in a preferred embodiment of the present invention the rung clamp assemblies 80 comprises a t shaped support bracket 82 , a clamping hasp 84 and a clamp screw 85 . the support bracket 82 includes a tray engaging end 86 , which defines a plurality of fastener apertures 87 , and a rung engaging end 88 . the tray engaging end 86 is generally planar and is attached to the underside of the planar tray body 52 by fasteners 89 , such as rivets , disposed through the fasteners apertures 87 of the tray engaging end 61 and cooperating apertures 90 defined by the tray body 52 . the rung engaging end 88 of the support bracket 82 includes a curved clamp portion 92 which is adapted to engage a lower peripheral portion of a side rung 40 . the clamping hasp 84 includes an engaging tang 93 and a curved hasp clamp portion 94 which is adapted to engage an upper peripheral portion of the side rung 40 . to secure the rung clamp assembly 80 to the upper side rung 40 , the curved portion 92 of the rung engaging end 88 of the support bracket 82 is positioned about the rung 40 . the tang 93 of the clamping hasp 84 is inserted into a tang engaging aperture 95 defined by the support bracket 82 adjacent the curved portion 92 . the clamping hasp 84 is pivoted about the tang 93 such that the curved hasp portion 94 engages the upper peripheral surface of the side rung 40 . the clamp screw 85 is disposed through cooperating clamping apertures , 97 and 98 , defined in the support bracket 82 and the clamping hasp 84 , respectively , adjacent the curved portions 92 and 94 , respectively . after the rung clamp assemblies 80 of the catch tray assemblies 10 are engaged with the rung 40 , the catch tray 50 is preferably positioned with the upper tray catch surface 55 disposed in a substantially horizontal plane . the clamp screws 96 are then tightened to maintain that position . in the preferred embodiment of the present invention it would be desirable to allow the catch tray 50 to be oriented generally vertically for convenient storage of the high chair c . as shown in fig8 the rung clamp assembly 80 includes an angled offset portion 100 which allows the catch tray 50 to be oriented in the vertical position without interfering with the legs of the high chair c . to move the catch tray 50 from the horizontal to the vertical position , the clamp screws 96 of each of the rung clamp assemblies 80 are loosened so that the rung clamp assembly 80 will rotate about the rung 40 . the catch tray 50 is rotated about the rung 40 and then the clamp screws 69 are tightened to secure the catch tray 50 in the vertical orientation . while the present invention in its various aspects has been described in detail with regard to preferred embodiments thereof , it should be understood that variations , modifications and enhancements can be made to the disclosed apparatus and procedures without departing from the spirit and scope of the present invention as defined in the appended claims .