That's what they call bracelets made by Onu-Matoran.

...

That game is epic. I got to play it at my aunt/uncle/cousins' place, and it's a riot.

My aunt was trying to sing "Down With a Sickness" by Disturbed. XD

Also, apparently I'm a good vocalist on that game. Hmm. Cool, 'cause I suck at drums, and I'm only decent at bass and guitar.