This past meeting the Sea Scouts were challenged to build an electric motor using a length of copper wire, a magnet and a AA battery. Very simple but it did demonstrate the electro-magnetic forces present to produce movement of the wire (armature).
It really worked, the trick was balancing the CU wire on the positive terminal of the battery.
Check out the Bay Sea Scout Instagram page to see the motor in action. Please become a follower to while you are there. We have a lot more up our sleeve.