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In this activity, learners build water-propelled engines from soft drink cans.

In this activity, learners will engineer their own weather vane. This activity includes step-by-step instructions with pictures and a "What's Happening?" section explaining how the activity worked.

In this engineering design challenge, learners build an air-powered spinning machine.

In this activity, learners engineer a paper helicopter that spins to the ground when dropped.

In this engineering design challenge, learners build an octopus-inspired suction pad that can grab an object and hold it tightly in the air.

In this activity, learners consider how a simple machine, a lever, turns a small push or pull (a small force) into a larger--or stronger--push or pull (a larger force).

In this activity, learners will explore how and why weight distribution works.

In this activity, learners design and build a Zoom-a-rang using everyday materials. Experiment with different materials and Zoom-a-rang designs to see how they fly.

In this activity, learners build their own rockets from paper, coffee stirrers, and tape. Learners discover that when anything flies, air pressure is always involved.

In this activity, learners use simple, everyday materials to experiment with balls and ramps.

In this activity learners will build roller coasters and test them using small balls or marbles.

No glue is needed for learners of any age to become marshmallow architects or engineers.

In this engineering design challenge, learners make a bird and then control its flight with attached strings.

In this engineering design challenge, learners animate a facial expression and make a machine (zoetrope) that plays the animation back.

In this activity, learners design and build their own parachute using household materials with the goal of landing their passenger safely on a target.

In this engineering design challenge, learners make a bubble maze that allows bubbles to move through a series of “on” and “off” switches.

In this activity, learners build bridges and cantilevers in a series of "building out" challenges with straws and pins.

In this activity, learners explore different ways to stack cups to meet a personal goal.

Learners design, build, and test models of "dragon boats" made from up to three milk cartons.