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In this activity, learners build inexpensive pulley assemblies from pulley wheels used for sliding screen door replacement or from clothesline spreaders.

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

In this activity, learners explore electronics and motion by making a Scribbling Machine, a motorized contraption that moves in unusual ways and leaves a mark to trace its path.

In this activity, learners explore how watermills have helped harness energy from water through the ages.

In this activity, learners explore the engineering and principles behind working elevators.

In this activity, learners will build a ball run contraption.