What was the name of the windmill that spun when you twisted it when you were a kid?

The bamboo dragonfly is one of the traditional Chinese folk children's toys, which is widely spread.

The bamboo dragonfly consists of two parts, one is the bamboo handle and the other is the wings. When you play with it, you rub your hands together and then let go of them, and the bamboo dragonfly will fly up into the sky and rotate for a while before it falls down.

It is a very subtle invention in ancient China, this simple but magical toys, has made the Western missionaries marveled, called it "Chinese spiral".