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In this design challenge, learners will create wind-powered contraptions to transport a load, such as a cupcake or another small object, and test to see if they work.

In this activity, learners construct a simple game to test their hand-eye coordination and steadiness of hand.

In this hands-on engineering project, kids use two simple machines, levers and inclined planes, to construct their own pinball machines.

The goal of this activity is to design, build and test a house or toy for an animal.

In this activity, learners build mini-basketball courts and explore the laws of physics. Learners discover that everything you throw or shoot on earth travels in a parabola.

In this activity, learners build small animated toys that move.

In this activity, learners build a hot air balloon using just a few sheets of tissue paper and a hair dryer.

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

In this activity, learners build a bird that flies in place with help from a motor, wire, and some straws.

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

In this design challenge activity, learners build a tower that’s at least 12 inches high with two or more parts that move (spin, sway, or flap) in the wind.

In this activity, learners make bridges using an oil-based modeling clay (plasticene). The instructions include discussion questions for both before and after bridge building.

In this activity, learners build a seesaw powered by magnets.

In this activity, learners will build a roller coaster for a marble to run on using everyday household materials such as paper towel or toilet paper rolls, cups, boxes, books, buckets, chairs, etc.

Learners will build and experiment with their own windmills made from simple household materials.

In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.

In this activity, learners create a cool floating animal using the science of magnetism. Learners discover what happens when a piece of magnetic metal enters a magnet's field.

In this activity, learners will use a variety of household and/or natural objects to design a sculpture that balances from a single point.

In this activity, learners of all ages will roll a ball coated with paint to artistically visualize the motion of the object.

In this twist on a classic design challenge, learners will try to stop a bouncy ball from bouncing as they explore how to control the fall of an object.