How to Make it Work:
1) Insert one end of the string into a hole.
2) Wrap the string in line with the groove by rotating the gyro ball, and yes, the string will overlap. The purpose of the string is to create the initial momentum for the gyro ball. Usually you haven't been able to start the gyro ball without the string, but that's for more advanced users.
3) Hold the bottom of the gyro ball (ball facing up) and pull the string STRAIGHT up with force. It's possible to pull the string at an angle, but there's a greater chance of the end of the string getting caught inside the plastic holder for the gyro ball (speaking from experience).
4) Flip the gyro ball down (so that the hand holding the base is now on top AKA back-of-the-hand side up) and rotate your wrist clockwise while keeping your arm AND forearm straight. You'll hear the gyro ball pick up speed until the VROOOMMMM! sound picks up and the lights start flashing.
5) It'll be a lot easier to alternate hands and focus on your forearm or wrist at other angles after the gyro ball has picked up the right momentum. Have fun!