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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 develop an understanding of air pressure in two different activities.

Learners build devices from rubber bands to test for invisible air pollutants.

Learners tour their school or home looking for sources of indoor air pollutants (IAPs).

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 build particulate matter collectors--devices that collect samples of visible particulates present in polluted air.

Learners color and cut out a spiral-shaped snake. When they hang their snake over a radiator, the snake spins.

Learners observe a simple balloon model of an electrostatic precipitator. These devices are used for pollutant recovery in cleaning industrial air pollution.

In this engineering activity, learners investigate the differences between the strength of bridges made from flat and round building materials.

In this great hands-on activity, learners use patterns to make a teepee from newspaper that they sit inside.

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

In this engineering design challenge, learners make a bird and then control its flight with attached strings.

In this activity, learners will build a stomp-powered launcher to blast off paper rockets they design. Materials can be found at a local hardware store or you may already have them at home.

Learners create an electrical-circuit maze out of wire, then try to pass a paperclip through the maze without touching the wire.

In this activity, learners use Jell-O to explore lenses. Learners cut Jell-O into convex and concave lens shapes and examine how light exits each lens in a darkened room.

In this activity, learners design and build a NASA rover using raw pasta and candy with a limited imaginary budget.

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

In this activity, learners demonstrate and discuss simple circuits as well as the differences between parallel and serial circuit design and functions.

In this robotics activity, learners find ways to express emotions and feelings using only body movements, not facial expressions.

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