When the LED is immersed in the liquid nitrogen, the colour changes!

Read more: LED in Liquid Nitrogen

You can bend a beam of electrons with an applied magnetic field to make a great demonstration of the Lorentz Force.

Read more: Bending an Electron Beam with Magnets

Illustrate magnetic field lines with iron filings suspended in a thick liquid.

Read more: 3D Magnetic Field Lines

A switching electric field makes a bell ring!

Watch The Video:

Read more: Franklin's Bells