Pencil, pin, paper = phonograph.
Make a battery with plates made of two different metals and your own two hands.
Boil liquid with just the heat of your hand.
Make it stick.
You can focus the invisible light from an electric heater.
Why the world gets dark so fast outside the circle of the campfire.
Seeing is a cooperative effort involving your eyes and your brain.
Use gelatin as a smoked lens, to view total internal reflection, and as a color filter.
Images of images of images can appear to repeat forever.
See pictures in thin air.
Iron filings will trace out the lines of a magnetic field in three dimensions.
Magnetic lines stop here.
Copper coils become electromagnetic swings.
This experiment shows how your doorbell works.
How far can you blow a marshmallow?
Exploration of the basis of lactose intolerance.
