Get you and your child's brain moving with these spinning gear cogs. The colorful pieces are permanently connected, but each shifts up to 225 degrees and to form hundreds of different patterns. A great puzzle game for kids and adults alike - Coggy comes with a set of challenge cards that will move you through easy, medium, hard, and extra hard formations. 16 adjustable plastic gears, measure 14" end-to-end when laid out. Safe for children ages 6 and up.