Do you think that modern science can make a better yo-yo? You can find the answer here.   You will also learn how the modern yo-yo works.

1.A yo-yo with a heavier rim makes the    yo-yo sleep longer.

2.The skinnier the axle, the less friction so it spins longer.

3.When the yo-yo wobbles when it’s          sleeping it means that the weight of the yo-yo is not even on each side.