Time to write about another robotics project I did! Make hosted a robot building contest, where you had to build a robot that was able to navigate around an area on its own. However, this project had to use a CD or disc somewhere in the robot. I took the wheels off my 3pi robot, and taped them to a blank CD for wheels! 
I taped the wheels that came with the 3pi to the blank CD, and I had to try taping it several ways before I found a way that worked well. Once I did that, I was able to upload some of the line-tracking code to the 3pi.
Once that was all done, I was able to make the 3pi navigate through a maze, and since the coasters made it taller, it was able to track a wider area (with a few ajustments).
I didn’t win, but I still qualified, I get a Maker’s Notebook, and it made it on the Make site today! 
Thanks to everyone who helped! 
The iPad will also display a message that the attached USB device isn’t supported, but it will still work anyway. You’ll also need to make sure the iPad isn’t sleeping, otherwise, it will power off. This also doesn’t work on an iPhone.