This science kits are designed for children education. It's an educational toy set which is great for kids training their hand-on skills and creativity. it is able to inspire boys and girls to love science and build their self-confidence. Features -Color:Assorted Color -Material:PP, Rubber -Size:5.70X5.70X4.70cm/2.24X2.24X1.85in - process of this toy is not particularly complicated, it is very suitable for children to play. -After the child completes , he will have a great sense of accomplishment and fall with handmade creation. -It can improve children's observation and thinking skills, and cultivate their interest in science. -PP, Rubber materials, which is safe and , and your children can play with peace of mind. -Encourage our kids to explore expansion contraction knowledge from these DIY expansion contraction kits. Package list: 1 x Set of Educational Toy