a hoop 10 is shown according to the present invention formed of a tube 12 having a generally d - shaped cross - section as best shown in fig4 and 5 , with a flat wall 14 facing outwardly of the hoop 10 and located between two outwardly projecting end ribs 16 . the ends of the tube 12 are joined together to form the hoop 10 by a generally d - shaped connector plug 20 as shown in fig6 , the outer dimensions of the connector plug 20 desirably being sufficiently close to the internal diameter of the d - shaped tube 12 so as to provide a good friction fit . alternatively , or preferably in addition to the friction fit , staples are driven through the tube 12 and connector plug 20 therewithin from the exterior of the flat wall 14 adjacent the two ends of the tube 12 . the hoop 10 is formed of semi - rigid plastic , preferably extruded polyethylene or polyethylene terephthalate glycol ( petg ), the latter being a type of saturated , i . e . thermoplastic , polyester . the connector plug 20 may be formed of a similar plastic . the wall thickness of the tube 12 can vary , but in one non - limitative example is approximately 1 mm . the overall outside dimensions can also vary , and in one non - limitative example the width of the flat portion 14 between the end ribs 16 is about 1 . 3 to 1 . 5 cm . placed on the flat surface 14 between the two outwardly projecting end ribs 16 is a decorative strip 18 , which may simply be a decorative plastic tape having any form of decoration on its outer surface and adhesive on its inner surface . the decorative strip 18 is simply adhered to the outer surface of the flat wall 14 in any suitable manner , and may have any type of decoration thereon , e . g . diffraction rulings produced by holographic printing , or simply decorative patterns of various types . the advantage of the present construction is that it makes decoration of the hoop 10 very simple and easy . no decorative wrapping or covering is required . an adhesive tape of any material , e . g . paper , plastic , cloth , having a decoration on its outer surface and adhesive on its inner surface , and having a width equal to or even somewhat less than distance between the end ribs 16 , can simply and easily applied to serve as the decorative strip 18 , the end ribs 16 serving to provide a suitable boundary for maintaining the location of the decorative strip 18 . it will be understood that with such a constructions , a standard hoop can be made to which a wide variety of decorative strips can be applied . the present construction solves another problem which undesirably sometimes arises in the prior art wherein the hoop tubing has a circular cross section , the problem of connector deformation resulting in maintaining the overall shape of the hoop . the d - shaped cross - sectional configuration of the hoop tube 12 and the connector plug 20 , particularly when the corresponding connector plug 20 is well anchored within the abutted ends of the tubing 12 , such as by staples , adhesive or the like , serves to maintain the shape of the hoop 10 without deformation . it is also desirable to provide a freely flowing material within the hoop , e . g . hard beads , small ball bearings , sand , or even liquid , e . g . water . a mixture of such materials may also be provided within the tubing 12 . the connector plug 20 , being hollow and having a bore of substantial cross - section permits substantially unrestricted flow therethrough . the invention has been described above as embodying a tube with a d - shaped cross - section with the end rib 16 defining the flat portion 14 . however , it will be understood that other cross - sectional configurations are contemplated , although not preferred . one such alternative cross - sectional shape is a d - shaped without the end rib 16 . other embodiments have other cross - sectional shapes including b - shaped , p - shaped , r - shaped , rectangular - shaped , and variations therebetween . the foregoing description of the specific embodiments will so fully reveal the general nature of the invention that others can , by applying current knowledge , readily modify and / or adapt for various applications such specific embodiments without undue experimentation and without departing from the generic concept , and , therefore , such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments . it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation . the means , materials , and steps for carrying out various disclosed functions may take a variety of alternative forms without departing from the invention . thus the expressions “ means to . . . ” and “ means for . . . ”, or any method step language , as may be found in the specification above and / or in the claims below , followed by a functional statement , are intended to define and cover whatever structural , physical , chemical or electrical element or structure , or whatever method step , which may now or in the future exist which carries out the recited function , whether or not precisely equivalent to the embodiment or embodiments disclosed in the specification above , i . e ., other means or steps for carrying out the same functions can be used ; and it is intended that such expressions be given their broadest interpretation .