Elemental Mood Lighting : Troubleshooting - YouTube

I played around with the moving parts of the stones today to see if I could get the desired effect I was aiming for. After some assessment (above) I've concluded that our problems seem to be a mixture of having too weak of motors, too much friction between the moving parts, and just enough slop with the internal mechanism that the combination leaves for some inconsistency. The wedge bits don't move a whole lot to begin with, so any amount of inaccuracy/slippage is super noticeable. LAME! 

Maker Faire is next weekend, so after that hurdle I might reevaluate my pulley system on the inside and pick up some motors with a bit more umph. They'll still look nice in my booth, so if you plan on being up in San Mateo next week, be sure to come see the stones (and my robot army). 

-Sarah & Mark