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With a magnet, iron fillings, and a bottle, you can create a cool demonstration about magnetic lines of force: the fillings will arrange themselves within the magnet's magnetic field.

In this activity about vision and optical illusions, learners conduct a simple test to demonstrate how our eyes create "afterimages." Learners stare at a black cardboard bat for at least 30 seconds an

In this activity, learners create an optical illusion by spinning two attached cups. A round ball seems to magically appear when the cups spin.

In this quick activity, Dracula has a hole in his house and learners help solve the problem by using a mirror and protractor to reflect incoming light out of his house.

We don't normally view people upside down and so our brains aren't accustomed to it.

This science activity demonstrates the dominant eye phenomena. What does your brain do when it sees two images that conflict?

In this activity about phase change and condensation, learners boil water in an empty pop bottle in the microwave.

In this optics activity, learners use water to make a coin "appear" and "disappear." Use this activity to demonstrate how light refracts and introduce light as waves.

Sound can travel through a variety of media.

In this activity, learners create a water prism to break light into the seven colors of the rainbow.

In this optics activity, learners use glass and water to demonstrate total internal reflection (TIR).

Create a simple dual pendulum and get them to swing in identical ways. This is a simple, low cost, activity produced by the Exploratorium.

In this activity, learners discover that atoms and ions of different metals will change places.

Visitors observe a graduated cylinder with a golf ball floating about halfway in liquid. The bottom half of the cylinder contains a concentrated solution of salt.

In this activity, learners discover how hard their hearts work to pump blood.

Play with a slinky and make transverse waves. In this simple Exploratorium Science Snack, learners will experience making waves and will learn the different parts of a wave.

Put a string around your head, and play it! Learn about vibration, sounds, and pitch.

In this easy demonstration (3rd on the page), learners explore depth perception by conducting a test with two pencils.

This is a quick and simple demonstration about reflexes (fourth activity on the page). One learner stands behind a see-through barrier like a window or wire screen.

In this activity, learners are challenged to lift a floating ice cube out of a glass of water using just one end of a piece of string.