In this challenge I had to make a Bristle Bot that was under $3. Before I built it, I had to do some reverse engineering on some parts. The bot consists of a battery holder out of a fan, the vibrator of the toothbrush, and a scrubber. I had to first take out the vibrating machine then but out the battery pack. After, I glued them onto the scrubber. Lastly, I soldered wires onto the switch, battery pack, and machine. I made sure that the solder was not touching each other so it would work right.