When you are playing bionicles, and your boomerang only goes a short distant. You can find a little red circle in the air, if you jump up and take it, it will make your boomerang go farther.

1 will make it go twice as far as before.
2 will make it stronger and go even farther.
3 will make it so you will have 2 boomerangs.
4 will make it so you have two boomerangs and if you hold the "throw" button it will change to green then blue.

It's cool. Try it when you get the chance.