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In this demonstration, learners observe vinegar and baking soda reacting to form carbon dioxide (CO2) gas.

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

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.

Learners see convection currents in action in this highly visual demonstration. Sealed bags of colored hot or cold water are immersed in tanks of water.

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.

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

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

In this activity, learners examine baking powder, a combination of three powders: baking soda, cream of tartar, and cornstarch.

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.

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

What's a more compelling problem to solve than being stranded on a deserted island?

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 project, students explore how levers work, by making a puppet with moving limbs.

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.

In this activity, learners use tinfoil to build and test their own boats - which designs will float, and which will sink?

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

Learners work in groups to build model cars from paper parts. First, each learner builds cars individually and the group times themselves.

Learners explore the Bernoulli effect by building an airfoil (airplane wing) and making it fly.

A group of 6 learners works together as a team with each learner performing a different role. Together, they need to maneuver a die through a maze.