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Students design and create their own air-powered rockets, in this hands-on activity.

In this activity, learners discover how frogs' bodies change while growing from a tadpole to a frog. Learners create a simple craft that gives a visual display of the metamorphosis process.

In this activity, learners build a sled kite that models a type of airfoil called a parawing.

In this activity, learners will become an engineer by designing and engineering a miniature parachute.

In this activity, learners explore dinosaur skeletons, anatomy, and locomotion. Learners compare and contrast dinosaur skeletons and drawings.

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, learners design, build and test a model suspension bridge for sturdiness and strength.

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.

This fun activity uses simple materials such as milk cartons and mirrors to introduce the ideas of optics and visual perception.

In this engineering activity (page 3 of PDF), young learners investigate how a pole can be made stable by “planting” its base in the ground or adding supports to the base.

In this engineering activity (page 5 of PDF), young learners investigate how materials and design contribute to the strength of a structure, particularly walls.

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.

With two stacks of books and a few rolls of pennies, build two kinds of bridges--a beam span and an arch span--and see how much weight each of them can hold.

In this activity, learners work in teams to construct and test fly drinking straw rockets. Learners explore how changing the rockets' fins affect flight distance.

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.