The six chunky shape blocks are each designed with fascinating textures that are sure to thrill the fingers. There's a cube, a diamond, a sphere, a triangle, a flower, and the happy Fat Brain logo... But the best part? As kids push the shapes through the elastic bands of the cube, curiosity is sparked and young minds can't help but explore, experiment, and discover. It's beautifully simple and amazingly mind-expanding! Play freely with InnyBin. InnyBin Innovative shape-sorting box Encourages fine motor skills, tactile exploration, experimentation 6 chunky, uniquely textured shapes fit through the elastic bands of the cube A tactile challenge for little ones A frustration-free shape-learning experience Shapes include cube, diamond, sphere, triangle, flower, Fat Brain logo Cube measures 5.5 x 5.5 x 5.5 inches Shapes each measure approximately 2 x 2 x 2 inches BPA-free - Exceptionally safe High-quality materials and construction - Lasting durability