These are some cognitive model toy kits made of plastic, which are mainly used to help children improve their cognitive abilities and understand the growth cycle of butterflies. workmanship, long- , not easy to damage. Through these simulation models, children can have more fun and learn more about biology effectively. Features -Material: Plastic -Size: About 5.50X7.00X3.00cm/2.16X2.75X1.18inch[OX662] -Size: About 10.50X6.00X2.00cm/4.13X2.36X0.79inch[OX661] -Size: About 7.00X5.50X2.50cm/2.75X2.16X0.98inch[OX1628] -Designed for children, they are light and practical, easy to grasp, and can be carried around. -These models can help children explore nature and understand life in a safer way. -Simulate the life cycle of real butterflies to help children and cultivate their sense of awe in life. -These kits can roughly help your child understand the growth cycle of butterflies in detail and learn biological growth knowledge. -These models have good craftsmanship details, is small and , bright and vivid, and can easily win the love of children. Package list: 3 x sets of butterflies growth models