If you prefer, you can watch an assembly video that shows you how to build your bristlebots. Variations
Try building more bristlebots with even more types of toothbrushes. Which toothbrush head works the best?
If you would like to build a larger robot that works on the same principle as the bristlebot (vibrational motion), check out the Science Buddies project Art Bot: Build a Wobbly Robot Friend That Creates Art. The electronic parts required to build an Art Bot are already included in your Basic Vibrobot kit from Science Buddies.