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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.

Groups of learners are provided with a generic car base and an egg. Their mission: design a device/enclosure to protect the egg on or in the car as it rolls down a ramp with increasing slopes.

To learn how friction affects motion, learners build a measurement tool from a rubber band and other simple materials.

In this design challenge activity, learners build a rubber band-powered rover that can scramble across the room.

The goal of this activity is to design the fastest sailboat or one that carries the most treasure.