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

In this activity, learners recreate a method of detecting and correcting errors in computers called 'parity'.

In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.

These two activities (4th on the page) demonstrate the importance of two eyes in judging depth.

In this activity and/or demonstration, learners illustrate visually and physically that air has weight. Learners balance two equally-inflated balloons hanging from string on a yard stick.

In this physics demonstration, learners will be surprised when a lemon slice appears to magically levitate within a pint glass.

This experiment is designed to illustrate how fluids, including water, have the ability to flow.

In this demonstration, learners will be "wowed" as three matches burn to form a triangular pyramid shape and "magically" rise off the table.

This is a classic exercise for visualizing the scale of the Solar System.

In this activity, learners use a pencil, magnets, and mat board to illustrate Newton's Second Law.

In this demonstration, learners attempt to get a large coin through a small hole, the size of a smaller coin.

In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.

In this activity, learners electrically plate zinc onto brass objects.

This simple activity uses paper and scissors to convey two key concepts to learners: the nanoscale is very small and working on the nanoscale requires special tools.

A simple, yet fun activity that lets learners find the center of balance of a ruler (or any long thin object). Developed by the Exploratorium and no assembly needed.