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Push Pull Painter
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In this activity, learners create painting machines that can paint moving forwards and backwards.

Parachuting Pinwheel
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Build a pinwheel that works without wind! This activity contains steps on how to build a parachuting pinwheel out of paper, a film canister, and some brads.

Full of Hot Air: Hot Air Balloon Building
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In this activity, learners create a model of a hot air balloon using tissue paper and a hairdryer. Educators can use this activity to introduce learners to density and its role in why things float.

Diving Submarine
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Learners use a commercially available toy to experiment with density. They fill a chamber in the toy submarine with baking powder and release it into a tank of water.

Glider
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In this activity, learners construct paper airplanes that twist and turn.

Straws and Airplanes
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Create airplanes from straws and geometric shapes. Test them out to see how far they can fly, or how accurately they can be aimed.

Rubber Band Car
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In this design challenge activity, learners build a car that can travel at least four feet using rubber band power and use the design process to debug problems.

All Wound Up
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In this activity, learners build a racecar using only a rubber band, spool, straw, and paper clip! This racer is a classic toy that zips across a flat surface.

Cup Sailing Game
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In this online Flash game, learners will captain a sailing challenge, adjusting boat direction and sails, seeking the way to take greatest advantage of varying wind speeds and directions to catch the

From Here to There
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In this water activity, learners discover ways to move water across the water table.

Motorized Car
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In this design challenge activity, learners build a car that uses a battery-operated motor to "drive" at least ten feet.
Ride on a Slide: Toys or Tubes Ride Slopes and Angles
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This activity is a hit for family events and all ages—some will finish in 45 minutes; others can go on for hours.

Balloon Rocket
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Experiment with force and pressure by building a balloon rocket. When launched, the balloon will run a track wherever you place the string.

Prepare for a Construction Zone Field Trip
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In this activity, learners explore work, forces, simple machines, and construction. This lesson guide includes simple ways to demonstrate these principles as well as hands-on activities.

Backyard Biodiesel
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In this activity, learners make a small batch of biodiesel that will work in any diesel engine. Learners use an old juice bottle as a "reactor" vessel to chemically process vegetable oil into fuel.

Playing with Parachutes
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In this activity, learners explore how parachutes are used to slow down moving objects. Learners work in teams of "engineers" to design and build their own parachutes out of everyday items.

Design a Lunar Rover!
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In this team design challenge (page 2-10 of PDF), learners design and build a model of a Lunar Transport Rover that will carry equipment and people on the surface of the Moon.

Proportionality: The X-Plane Generation
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In this activity, learners build a 1:140 "scale model" of NASA's X-33 Reusable Launch Vehicle (RLV) Technology Demonstrator, and investigate how the model dimensions compare to the real vehicle.

What Gives?
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In this activity, learners design, build and test a model suspension bridge for sturdiness and strength.

Balloon Car
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In this physics activity, challenge learners to make and race a balloon-powered car. Learners construct the body out of a paper cup, wheels out of wooden spools. and fuel tank out of a balloon.