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

Students design and build their own parachutes in this hands-on engineering project.

In this activity, learners consider the water features they might enjoy at a community park--a pond, brook, water playground (or "sprayground"), or pool--and what happens to the water over time.

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 are invited to imagine the park of their dreams!

What's a more compelling problem to solve than being stranded on a deserted island?

In this project, students explore how levers work, by making a puppet with moving limbs.

In this activity, learners use tinfoil to build and test their own boats - which designs will float, and which will sink?

Build and test a scale model of a rainforest canopy walkway.

In this experiment, learners design and build a model room in a shoebox and furnish it with tiny furniture.

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

In this activity, learners design a therapeutic agent to image and/or cure various diseases in the respiratory system.