Package Include 3 Sets x experiment toys Features - Color: Random color. - Made of premium material, it can train your children' s observation capability, thinking and analytical skills. - the fun educational gift for kids and teenagers who science projects, can well develop kids' learning skills and hand- on ability. - Material: Plastic. - Properly educating some friction knowledge would be a good interaction time with your kids together. - The friction wheel toy can inspires kids curiosity and creativity, well learn simple friction principles. - Size: 8.00X4.00X2.00cm/ 3.14X1.57X0.79 inch. - Nice educational toy that you can have one and let your kids have a great fun from it. Goods Description Are you looking for educational toys that kids would love to play with while learning? Then we have the perfect item for you! The perfect friction wheel toy for kids to have both fun and knowledge. It will teach them to follow simple instructions and improve their hand- eye coordination.