Windmill is a common children's toy, which is deeply loved by people. The existing windmill is usually relatively simple, and its structure generally includes a wind wheel and a support rod. The wind wheel is installed on the support rod and can rotate relative to the support rod under the action of wind force. However, the traditional windmill structure is too simple to meet the diverse needs of people now.

Toys generally refer to things that can be used to play. In human society, playing with toys is often used as a way of entertainment. Toys can also be natural things, that is, sand, stones, dirt, branches and other non-artificial things. Toys should be understood broadly. They are not limited to things sold on the street for people to play with. Anything that can be played, seen, heard and touched can be called a toy.