Abstract: An educational toy comprising an open top rectangular box having a plurality of like bottom sockets in a spaced apart relationship in its bottom and a truncated corner post at each interior corner, a plurality of rectilinear platform blocks of different heights each of which is provided with a mounting post that extends from and perpendicular to the bottom thereof and which post is adapted to be removably inserted into any bottom socket, a color board adapted to be removably placed in the top of the box and to sit on the truncated corner posts and having a plurality of distinctively colored figures equal in number to the number of bottom sockets painted or otherwise provided on one surface thereof in a spaced apart relationship, and a grate adapted to be removably placed in the top of the box and to sit on the truncated corner posts and having a plurality of spaced apart openings therein equal in number to the number of bottom sockets and adapted to receive a plurality of game blocks slidably inserted lengthw