This is a tiny version of a bristlebot, threaded onto a copper wire. Instead of making it carry a self-contained motor and battery, we used the wire as an electromagnet to vibrate a small permanent magnet hanging below the device. Instead of toothbrush bristles, there is a goose down feather touching the wire. These ~1cm long devices travel toward the “bird” end of the feather when run at 100 Hz. The feather gives it a preferred direction of motion using natural “bristles” that are about 5-10 microns in diameter, the same size scale as the flexible microstructures we have been making in the cleanroom.