craftgrrl | Weird, plastic, colorful gears?

Hey gals (and guys), i need your creative help here. My boyfriend just gave me a box full of these colorful plastic gear type things. I absolutely love them but i have NO clue what to do with them. They're a rare treasure :) they have a lot of potential, that i know...but i'm at a total loss! They come in a rainbow of colors, and they're about 2 and a half inches across. There are also a couple of these weird green connector things, which i also have no idea what they could be used for.