Abstract: A take-apart toy includes a universal flat body and a set of appendages for forming a toy, such as a geometrical shape, building member ornament, or figure. The body is provided with elongated grooves on each side, uniformly spaced from the body's edge. Each appendage includes a body receiving slot having groove-engaging lugs at an outer end for engaging the grooves and releasably securing appendage to body. The elongated grooves permit selective movement and positioning of the appendages around the body without disengaging the lugs from the grooves. The appendage slots are longer than the distance between the grooves and the body edge to permit angular adjustment of the appendages on the body, also without removal of the lugs from the grooves. Selected appendages are also provided with similar elongated grooves for attachment of other slotted appendages thereto.