Description: Science Experiment Material Set: Unpainted science experiment kits help students enhance their scientific knowledge Unfinished: Puzzle kits for kids, which need to be assembled by yourself to exercise children's hands on ability, thinking ability, and fine motor skills. And need to color by yourself Sturdy Materials: Science experiment stem project are made of wood materials, sturdy Interaction: Building kits, parents can make and assemble them with their children, cultivating their interest in science and enhancing the relationship between both parties Gift: Wooden 3d puzzles are early education gifts for children, promoting interest and creativity Specification: Material: Wood Size Chart: 200mmx88mmx75mm/7.87inchx3.46inchx2.95inch Package Includes: 1x Wooden Science Experiment Model Kits Note: 1.This is not infant toy, please take away from children to avoid eating.2.Please allow slightly errors due to manual measurement and different monitors.