further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates referring to the drawings in detail fig1 shows the main guide wall member 11 which has a flat front face 12 disposed in a vertical plane 13 the rear support members 14 and 16 are fastened to the back side of member 11 and extend rearwardly therefrom and provide balance and support for the member 11 so that it can be placed on a supporting surface such as the ground or grass or a floor to hold wall 12 in the vertical plane 13 back braces 17 may be provided at opposite ends of the member 11 and fastened to the back face thereof all of these members 11 14 16 and 17 may have a flat bottom such as the lower edge 18 of member 11 if desired however if there is a likelihood that the apparatus would be placed on an uneven surface appropriate recesses or hollows could be employed so as to enable maintenance of the vertical attitude of the planar wall front face 12 in plane 13 the members 11 14 and 16 provide a base for a ball storage area.