This temperature difference kinetic energy windmill is a new type of toy, which should be liked by many people. Because it is really surprising. It is a bit like the windmill we played with when we were young, but the windmill relies on the wind or blowing to rotate. However, this temperature difference kinetic energy windmill is based on the temperature difference to rotate. Its principle is: the different temperature difference between the upper and lower parts makes its internal produce pressure to squeeze upward, and the branch strip drives the film upward to cause negative air pressure, and conversely moves its internal downward. Such repetition makes the branches move up and down. In this way, the windmill rotates without any external power, no need for batteries or power supply. If you put it at home and find a way to make it produce a temperature difference, then this windmill can rotate automatically. Music boxes, wind chimes and other couples' gifts should have some new ideas. In the future, lovers will have more interesting gifts to send. Give the other party a surprise earlier. Moreover, its price is not high. The current retail price is only 88 yuan.