Instructions how to make very small train from AAA battery and magnets, how to make copper wire coil with a simple tool. Main parts you need:
-Neodymium magnets size: 1/2" (13mm) diameter x 1/8" (3mm) thick
- Ground metal rod 5/8" diameter or 1/2" copper pipe, any length.
-18 or 20 gauge uncoated (bare) copper wire, we used tin plated copper wire,
This was middle school science project.