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Learners explore the concepts of equilibrium and center of mass by seeing how non-symmetrical objects balance.

Learners build a simple hovercraft using air from a balloon to levitate a craft made from a compact disc (CD).

Learners construct a rocket from a balloon propelled along a guide string.

Learners build a model of a pollution control device--a cyclone. A cyclone works by whirling the polluted air in a circle and accumulating particles on the edges of the container.

In this demonstration, learners observe vinegar and baking soda creating carbon dioxide (CO2) in a bottle. The gas is poured out of a bottle onto a candle flame, putting out the candle.

Learners investigate how drag affects the falling rate of objects.

In this activity, learners simulate whale echolocation. Learners experience echolocation by wearing blindfolds, while another learner makes snapping noises in front of, behind, or to the side of them.

Learners test two jars containing hot water, one covered with plastic and one open, for changes in temperature.

Learners build at least two different spinners (tops) to investigate how mass distribution, size, and shape affect the length of time the spinner spins.

Learners conduct four simple experiments to demonstrate the effects of air pressure.

Learners cover a bottle with a balloon. When they immerse the bottle in warm water, the balloon inflates. When they immerse the bottle in a bowl of ice, the balloon deflates.

Learners test two jars of ice water, one covered and one open, for changes in temperature. After placing the jars in the sun, learners discover that the covered jar cools down more slowly.

In this activity, learners engineer a flying glider using paper hoops and a drinking straw.

In this activity, learners determine whether thermal energy can be used for work.

In this engineering activity, challenge learners to construct a paper bridge that can support 100 pennies.

Learners act as engineers and design mini submarines that move in the water like real submarines.

In this engineering activity, challenge learners to build a tower out of 10 sheets of newspaper and 3 feet of masking tape, which can hold a golf ball balancing at the top.

If you have 3-foot dowels and rubber bands, you can can started on this fun and open design challenge. You can make structures big and small: make it so you can fit your parent into it!

In this activity, groups cut out and sort cards showing items recovered from a crash landing on the Moon. The 12 items range from food and water to rope and matches to a self-inflating life raft.

This activity explores the main algorithms that are used as the basis for searching on computers, using different variations on the game of battleships.