Three magnetohydrodynamic propulsion projects

Here's a quick guide to the articles:

• First Demonstrate magnetohydrodynamic propulsion in one minute. You'll need a magnet, a battery, two wires, water, and salt and pepper.
• Next, Build a simple boat that propels itself with a magnetohydrodynamic drive
• Finally Get serious, and start hacking magnetohydrodynamic propulsion systems into RC boats.