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In this activity, learners make their own edible DNA double helix out of candy and find out about the shape of DNA.

In this activity (on page 2 of PDF), learners make their own totem poles out of recycled materials.

This quick demonstration (on page 11 of PDF) allows learners to understand why scientists think water ice could remain frozen in always-dark craters at the poles of the Moon.

In this engineering design challenge, learners build an air-powered spinning machine.

In this activity, learners build a hot air balloon using just a few sheets of tissue paper and a hair dryer.

In this activity, learners will explore the dynamics of air pressure by using a candle, a cup, and a dish of water.

Build and test a scale model of a rainforest canopy walkway.

In this activity, learners build an old-fashioned paddle boat out of simple materials.

In this activity, learners design miniature cars. Learners can create a telephone car, soccer car, merry-go-round car, or any other theme car they can imagine.

In this activity, learners build bridges and cantilevers in a series of "building out" challenges with straws and pins.

In this activity, learners will create their own coral polyps - the basis for a coral reef.

In this activity, learners will engineer three different parachutes to test how well each one works.

In this activity, learners will build ramps and test how the laws of physics apply do different objects. Learners will explore physics and cause and effect through this activity.

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

In this engineering/design/arts and crafts activity, learners design and build "platforms" or "bridges" that can hold weight, and test which glue makes the strongest structure.

In this activity, leaners explore building techniques by recreating the story of The Three Little Pigs.

Learners discover that soap can be used to power a boat. Learners make a simple, flat boat model, put it in water, and then add a drop of detergent at the back of the boat.

In this activity, learners use things from the kitchen as building materials to explore how shapes contribute to the strength of different structures.

In this activity, learners will explore how maps can provide information about a place and help us find our way from one location to another.

In this activity, learners act as the Earth and observe how different angles between the Sun, Earth, and Moon affect the phases of the moon we see each month.