Abstract
The authors have analyzed and manufactured children's toys. They are Paper boomerangs, Boomerang plane, Bamboomerangs, Paper cup boomerang, PET bottle rockets.The authors taught to children with our toys about manufacturing and way of playing toys. Our purpose is that children are interested in manufacturing and dynamics through playing our toys. The authors analyzed GariGari Propeller in this time. The GariGari Propeller composed of stick and propeller is toy. There is uneven on part of the stick. The propeller rotates when vibration occurs by rubbing uneven part of stick. The authors analyzed relation between rotating propeller and vibration.
