The toy "gyro" was told by my grandfather when he was a child. He liked it very much and made it himself. It was also my father's "toy" when I was a child. Today I saw the story of spinning top, which explained its manufacturing process, its "history" and its other name "spinning traitor", haha! How funny!
I watched this story with my grandfather, who told me a lot about their time. It was really a "difficult time"! However, people at that time were so optimistic and active! Just like when Grandpa was a child, the spirit of making toys by himself is worth learning!