pinwheel  
noun [ C ] uk/ˈpɪn.wiːl/ us/ˈpɪn.wiːl/
  (TOY)      
 US玩具风车 
a child's toy that consists of a stick with brightly coloured pieces of plastic at one end that turn around when you blow them or hold the toy in the wind 
  He gave the pinwheel a playful spin with his finger.
 - More examples
 - Beside the bench was a pinwheel and an arrangement of artificial flowers.
 - Use a pinwheel to show the baby how to pucker up and blow.
 - As the light is absorbed and radiated by these odd-shaped objects, they become like pinwheels in a breeze.