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In this design challenge activity, learners use a balloon and other simple materials to design an air-powered rocket that can hit a distant target.

In this invention challenge activity, learners see how many objects they can grab with a homemade "bionic" arm.

In this design challenge activity, learners build a shock-absorbing system that will protect two “astronauts” when they land.

In this design challenge activity, learners invent a convenient way for someone using crutches or a wheelchair to carry small personal items.

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 follow up to "Kicking Machine", learners add a hands-free feature to their Kicking Machine.