The instructions provided here are of devices that have been built for Jefferson Lab's Science Education program. The difficulty of construction varies from project to project. Anyone attempting to construct these devices needs to know and understand how to safely operate the tools required to construct them. If you do not know how to properly operate power tools or a soldering iron, you should not attempt to build any of these devices.
The Ring Fling Machine - Lenz's Law Demonstration Device
Electric Avenue - Parallel and Series Circuits
Get Connected! - An Electrical Conductivity Tester