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

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

In this activity, learners explore accuracy and precision.

In this activity, learners create a working model of a nail clipper. This activity helps learners learn the basic principles of simple machines, engineering design and model building.

In this dynamic activity, learners build a catapult that launches projectiles, such as marshmallows.