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Simply explain radioactivity and use the Geiger counter on some of our radioactive objects (such as the uranium orange plates).

In the box with the vacuum pump there are a few small spherical vacuum chambers. When these are properly sealed and pumped out they are very difficult to separate. Have some audience member try to pull one apart while the vacuum pump is pumping on it.

On of our favorite demonstrations! Students of all ages will love watching the marshmallows in the vacuum flask! Materials Büchner Flask (Vacuum Flask) Marshmallows Vacuum Pump Racquetball Partially Inflated Balloon Safety Precautions Please se...

Use the tesla coil! Please be careful with the high voltage use the grounding wand and where the electric gloves.

The theremin is very cool on its own, but even cooler if you explain how it works!

The Van de Graaff Generator generates very large amounts of static charge, very high voltage and high current (see this video), but is safe to touch and charge your own body. Try creating large arcs or making you hair stand up.

Throw some water balloons and catch them with a sheet to demonstrate acceleration and force.

This a wooden construction that explains how binary numbers work.

Take any four numbers (single digits) and add them together.Arrange the original four digits in any order to form a four digit number.Subtract the sum from this four-digit number, and you should get another four digit number.Hide any one of the four digits in ...

Have one person pretend to be a robot. Introduce the robot and then form a line of audience members to give instructions to the robot. Ask the line of audience members to instruct the robot to make a sandwich. The actor playing the robot should take all the in...

We have a stroboscope and constant speed rotator. Connect a disk to the rotator and tune the frequency to the speed stroboscope to the speed of the rotating disk.