Click Whiz 3D Pre-Assembled Magnetic Building Blocks, 7 Assembled Prisms, Starter Set 7 Assembled Prisms: iso. triangle, 2 cubes, 2 quarter circles, 2 right triangles. Plus 2 bonus character cards. Build with the help of magnets inside for fun and educational creative play Familiarize young children with basic three-dimensional shapes Patented grooved edges interlock to reinforce blocks' magnetic connections Compatible with all ClickWhiz 3D blocks and ClickBlock 2D pieces