The DIY Butterfly Toy Set is an excellent educational tool for children. Through the process of assembling the gears and crankshaft, children can gain a deeper understanding of mechanical principles and scientific knowledge. The repetitive motion of the wings, driven by the gears and connecting rod, mimics the natural movement of a butterfly. This toy encourages children to explore the and technology, fostering their curiosity and critical thinking skills. Features -Color:White -Material:Wood -Size:18.00X16.00X12.00cm/7.07X6.29X4.72in -Encourages scientific exploration with the diy hand cranked butterfly. Foster practical skills and critical thinking. -Improve children's interesting with DIY wooden hand cranked butterfly toys during the building process in daily. -Strengthens the bond between parents and children through wooden hand cranked butterfly making, very creative. -Functions as both an entertaining toy and an educational tool, boosting learning potential, meet diy need. -Great DIY toy for kids interests for learning of science, developing children structure imagination, exercising. Package list: 4 x set of DIY science butterfly material