DescriptionIt is a teaching AIDS toy, adopts scientific design, a great toy for kids, not only can enjoy themselves, but also can learn some scientific knowledge, and improve their hands-on ability also. It can attractthe kid's attention to enjoy the fun of playing.Features-Color:As Shown-Material:Wood-Size:19.50X9.00X0.50cm/ 7.66X3.54X0.20in -Made of premium materials, safe, practical and durable. -It can easily arouse children's interest in scientific physics experiments. -The product has very smooth edges in result in No scratch injure for kids hand. -Give full play to children's imagination and promote children's intellectual development. -Designed to encourage and promote learning in the crafts world, allowing your kids to enjoy DIY fun.