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Learners use shop tools and various materials to construct a magnetic spinner and a compass.

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

In this outdoor activity and game, learners explore how animals adapt for survival through coloration, markings and camouflage.

This lesson (on pages 46-55 of PDF) features two strategy board games -- one from Ghana and one from China. The first game, Achi, is a cross between checkers and tic-tac-toe.

In this activity, learners make homemade journals featuring seashell rubbings. First, learners transfer the texture of a seashell onto a piece of paper using a crayon.

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.

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

In this activity, learners explore how voting systems have changed with engineering advances over time. Learners work in teams to design their own voting system using easy to find materials.

Learners make a counting/estimating jar to exchange with friends or bring home.

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

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

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

In this math lesson, learners are introduced to proportional reasoning through modeling, sharing, and questioning techniques.

In this activity about encryption, learners cut out a secret decoder badge from a handout and use it to encode messages to each other.

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

Build a house you can fit inside, using cardboard tubes.

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

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

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

In this activity, learners explore how musical instruments are engineered.