Let's Make Robots!

Cool Balancing Bot

I was sent this cool video of a self balancing Robot. My niece wants me to buid one for her.

Wanted: Sharp GP2D12's

I am looking for someone willing to trade. I need 3 Sharp IR GP2D12 sensors with the cables and I have:

Where are the attachments???

Here is my question for the Admins: Where are the attachments on my robot page? Why are they only visible when you log in?