Description: 【DIY Assembly Model】:Wooden craft model can Exercise hands on ability and understand the structure and principles of Threshing Machine, The two gears fit together to drive the threshing machine, and stepping on the transmission pedal up and down drives the drum to rotate. The drum rotates rapidly to knock down the grains. 【Interactive】:Kids Physical Science Experiments Toy Create a harmonious parent child atmosphere for the family, allowing children to improve their collaboration and communication skills during the interaction. 【Development】: The Diy Technology toy can cultivate children's creative thinking, practical skills, scientific knowledge, communication, and interest cultivation. 【Occasion】:DIY mechanical Model Kits cultivate children's interests and hobbies.suitable for learning activities, technology projects, scientific experiments, etc. 【Creative Toy】: This 3D Wood Puzzle Assembly Model is interesting and creative, and can be used as a gift for children, students, or friends. Size Chart: 16cmx11.2cmx8.8cm/6.30inchx4.41inchx3.46inch Package Includes: 1 3D Wood Puzzle model 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.