Electronics, old computers and the simplest motor in the world.

''Electronics made easy - by A-Nony-Mus'' [source]
''ZX81: Small black box of computing desire'' [source]
''You have one drywall screw, one 1.5 V alkaline cell, six inches of plain copper wire, one small neodymium disk magnet, and no other tools or supplies. You have 30 seconds to make an electric motor running in excess of ten thousand RPM. Can you do it? Surprisingly enough, you can.'' [source]