Take a long length of thread, crochet thread works the best.

Thread it through both holes, until there is plenty of both cords on BOTH sides of the button.

Tie off the string

Hold the buzzsaw in both hands.

You then begin wrapping it over itself.

Until it has become tightly wound.

You then pull on the edges, which still have your fingers in them, and you see how many times you can get it to wrap and unwrap.

It is a simple game but has entertained me many an hour.