Learning about the four 3D solid shapes can be fun! Here are 36 self checking puzzle pieces of spheres, cubes, cones, and cylinders that can be used with the whole class, small groups, or in centers. They have square corners for easy cutting! The instruction page has several games to play using these pieces. For example, give each child a puzzle piece, making sure that another child has the matching piece. The students then scramble to find their match. This is definitely a two-step process act