How does a yo-yo work?
I remember walking the dog with my yo-yo. How a yo-yo works is, the yo-yo has a clutch and when you release the yo-yo the clutch is locked. As the yo-yo retracts the clutch unlocks the spindle. The momentum keeps the yo-yo going so flick that wrist. In-depth details on the yo-yo can be found at How Stuff Works. You can find more information here: http://entertainment.howstuffworks.com/yo-yo3.
