Features:Enhance children& 39;s science knowledge: The endless fun building toys encourage kids learn, ideal building kits for kids ages 8-12, great for educational and entertainment purposes.DIY:You can fully enjoy the hands-on ability and hands-on fun.Gift:Made of non-harm and wood. Perfect school project. Great toys for kids gift for birthday, children& 39;s day, Christmas, summer camp activities or back to school.No welding and glue:Easy Self-Assembly.Our mechanical toy is cut with exquisite lasers technology Includes all the parts except batteries. No need for screws or tools Improve your child& 39;s imagination and creativity by challenging them to build their own models.Service:If you have any question,please contact us to provide great service.Notice:1.Actual color may be slightly different from the image due to differentlight effect2.Please allow 1-3cm deviation due to manual measurementDescription:Material:WoodenSize:40cm *30cm *10cmPower supply mode:2 AA Batteries(not included).