MaterialScientific experiment toys is made of sturdy wooden material, which is durable and stable. FunctionDIY small toys, cultivate innovative ability, exercise children practical ability. Easy Installation The Science experiment easy to assemble for kids and adults, which can improve your child imagination and creativity by challenging them to build their own washing machine. DIYWooden air purifier can be painted by yourself, and it is also a beautiful home decoration after completion. GiftCompact and lightweight, it is also an ideal gift for children on festivals and birthdays. Specification: Material: Wooden Size Chart: 7cmx7.5cmx11cm/2.76inchx2.95inchx4.33inch Package Includes: 1 SetScience Experiment Equipment 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.