For children to learn about shapes and sizes and assembly, nothing can work better than a puzzle. The 1 - 2 - 3 Busy Bug Puzzle is simple enough for any kid to assemble the pieces together in order. They can build a bug with the base puzzle and encourage counting to three with the peg stacking system. Children also get to learn three basic shapes. Flip the bug face for a different expressions. Each shape has a fun surprise activity.