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In this engineering activity, learners explore simple machines and then build cardboard automata using cams.

In this activity, learners explore the concept of friction and how ball bearings reduce friction.

In this activity, learners build their own construction cranes using tongue depressors and pushpins.

Experiment with friction and make bearings for a whirligig! This activity is a nice introduction to friction and bearings and demonstrates why bearings are useful for spinning.