Click Whiz 3D Pre-Assembled Magnetic Building Blocks, 39 Parts (18 Assembled Prisms), Master Gear Set 39 Pieces Total: 8 cubes, 4 equi. triangles, 2 quarter circles, 4 right triangles, 4 large gears, 3 small gears, 14 accessories and 10 symbol cards that adhere to magnetic blocks. Build with the help of magnets inside for fun and educational creative play Combine basic three-dimensional shapes with real working gears! Create aircraft, buildings, towers, animals with gears that allow movement in an each structures Patented grooved edges interlock to reinforce blocks' magnetic connections Compatible with all ClickWhiz 3D blocks and ClickBlock 2D pieces