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Animal House
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The goal of this activity is to design, build and test a house or toy for an animal.

Exploring a Complex Space-Filling Shape
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In this activity, learners build a paper stellated rhombic dodecahedron, a three-dimensional 12-pointed star.

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

Bobbing Eyeballs
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In this activity, learners use simple materials and basic tools to construct a special toy to explore pendulums. As the head of the toy bobs one way, the eyeballs bob the other way.

Clap Sensor: Build a Sound Sensor Using a Pico Cricket
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This activity requires a Pico Cricket (tiny computer). Learners work on designing and building a sound sensor out of household materials, like plastic wrap and cardboard.

Sound Representation: Modems Unplugged
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In this activity, learners listen to songs and decode hidden messages based on the same principle as a modem. As a final challenge, learners decode the binary messages in a music video.

Blow It Away
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In this activity, learners design wind-powered cars out of simple household materials. Students have fun designing and then racing their vehicles around the room.

Wind Works!
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Learners will build and experiment with their own windmills made from simple household materials.

Paper Airplanes
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In this activity, learners explore the properties of paper by constructing and modifying paper airplanes.

Zipline
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In this design activity, learners create a vehicle that can transport a load, like a favorite toy or as a recycled object, from the top of a zipline to the bottom using only gravity.

Magnetic Spinner & Compass
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Learners use shop tools and various materials to construct a magnetic spinner and a compass.

Draft Detectives
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In this two part activity, learners become draft detectives by constructing their own draft catchers to detect drafts around windows or doors.

Dough Creatures
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In this technology activity, learners light up the room with electrifying play dough creations. Learners use conductive and insulating homemade play dough to build simple circuits.

Trebuchet Toss
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In this activity, learners explore trebuchet design. Teams of learners construct trebuchets from everyday materials.

Trophy Triathlon
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In this activity, learners are challenged to design and construct a trophy for prize-winning sports equipment.

Wind Tunnel
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Scientists use enormous wind tunnels to test the design of planes, helicopters, even the Space Shuttle.

Headphone Helper
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In this design challenge activity, learners add headphones to a previously built instrument (see "Build a Band" activity) to make it easier to hear.

Magic Lanterns
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A magic lantern is a light that projects an image onto a screen.

Skewers and Garden Poles
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In this activity, learners build scaled-down structures and cantilevers in a series of "building out" challenges with bamboo skewers and tape.

Tops
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In this activity, learners discover that some things only stand up while they are spinning.