Description:Science Experiment Material Set: Unpainted science experiment kits help students enhance their scientific knowledgeUnfinished: 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 yourselfSturdy Materials: Science experiment stem project are made of wood materials, sturdyInteraction: Building kits, parents can make and assemble them with their children, cultivating their interest in science and enhancing the relationship between both partiesGift: Wooden 3d puzzles are early education gifts for children, promoting interest and creativitySpecification:Material: WoodSize Chart:200mmx88mmx75mm/7.87inchx3.46inchx2.95inchPackage Includes:1x Wooden Science Experiment Model KitsNote: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.