An ultrasonic mist generator creates fog, a fan draws air upward, and directional vanes at the bottom excite the vortex, creating a tornado.

A low-voltage high-current power supply is connected to two rails. The circuit is completed by a rod laid across, whose magnetic field interacts with the array of permanent magnets beneath.

An ultrasonic mist generator creates a fog within a small volume. The volume is reduced by applying an impulse and a ring vortex, entrained with fog, emerges.

A polarizer sheet has been removed from a typical LCD screen allowing its content to be displayed only through a polarizer.

Neon bulbs are arranged on the tray of a microwave. When it is turned on, the bulbs light.

A battery (or generator) is hooked up to a circuit with a transformer coil. A change in current increases the voltage.

A circuit is completed at the junction of a graphite pencil "lead" and aluminum foil, creating plasma and cutting action.

A TV is set to a blue screen. A magnet is manipulated to show its field lines in rainbow colors.

A stepper motor is hooked to a speaker. Turning the shaft produces audible frequencies that correspond to the rotation.

A strip of tape that has audio recorded onto it is rubbed against the head of a tape player.

Small styrofoam beads dance in neat rows in the nodes of an acoustic standing wave.

Two dissimilar metals are connected to a micro-ammeter. Completing the circuit with an electrolyte initiates electric current.

A blower creates high velocity air which carries a piece of yarn into its path. The yarn is looped so that it is constantly flowing through the tube and into the air.

The motor of a tape player is hooked to a hand crank generator. The music changes with the voltage created.

A coil of wire connected to alternating current creates an oscillating magnetic field which induces an opposing magnetic field in a conductive ring, causing it to launch.

The horizontal yoke of a TV is connected to a microphone or other audio device to create a corresponding wave pattern on the screen.

An elastic cord is connected to an appliance that vibrates, creating standing wave nodes and antinodes that vary with tension, length, or driving frequency.

The Fresnel lens from an overhead projector is fastened to an upside-down garbage can to make a helmet that makes your face huge.

Create electricity with the turn of a crank! Have it power something, show you its voltage, or both!

Did you ever listen to a slinky? Like really listen? The sound may remind you of an old science fiction movie!

Rotate one polarizer with respect to another and beautiful colors will emerge from transparent-seeming film.