With its spinning disks and satisfying sparks, the Wimshurst machine is an excellent addition to any mad lab! This is a real simple (and small) version pretty much anyone can build: This gives you the basic idea. If you want to make it larger, add a motor, etc., building this little one will give you the knowledge you need! Here's a video showing another DIY version, but bigger! https://www.youtube.com/watch?v=SGASVWJPXNo ...