Block Stacking Puzzle Kids Balance GameBlock Stacking Puzzle Kids Balance Game is a fun and challenging game that you can use to challenge your friends. This game will test your balance, flexibility, and coordination skills as you try to stack the blocks in order without them falling over. It's easy enough for kids but also offers plenty of challenges for adults! The building block is made of plastic, and the surface is high quality, smooth, and features non toxic paint to be safe for fun.