robotime 3d wooden jigsaw puzzle game model kit children toys children girls birthday gifts

dynamic simulation, full mechanical gear drive. each model is designed, uniform color set solid 3d data, computer dynamic simulation. 20 times of preliminary revision, hundreds of times of bayonet optimization, countless times of exercise program deliberation, to achieve the true restoration of all details. i can move without batteries. the all-gear mechanical operation is based on the principle of elastic potential energy derived from physical mechanics. the complex assembly steps will not reduce the pleasure of brain-burning, but the operation process is simple and convenient.