Abstract: A toy including a three-dimensional base having a magnetic sheet on its rearward side for temporary attachment to a metallic surface. The frontal surface of the base defines plural recesses each for the reception of a correspondingly shaped magnetic piece. The pieces each have a magnetic component for retention on a metallic surface when removed from base recess. When in place in a base recess, the magnetic components of the base and piece retain the latter in place. The pieces and their recess walls may be color coded to teach color recognition. A recess wall surface is provided with an image which differs from the image on other recess wall surfaces.