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In this demonstration, learners observe the effects of air pressure. They will watch as marshmallows inside a bottle expand as a vacuum pump removes air from the bottle.

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

In this meteorology activity, learners build weather vanes using straws, paperclips, and cardstock.

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

Learners observe and conduct experiments demonstrating the different properties of hot and cold materials.

In this activity, learners make plates levitate! Learners build "hovercrafts" using simple materials to explore friction and motion.

In this activity, learners will engineer three different parachutes to test how well each one works.

In this activity on page 7 of the PDF (Plants—The Green Machines), learners examine the effects that light and air have on green plants.

In this activity, learners watch a figure "magically" float up through the air.

In this activity, learners build a hovercraft using a paper plate, cup, and simple motor.

In this activity, learners explore force and motion by constructing cardboard cars that are propelled by balloons.

In this activity, learners build a sled kite that models a type of airfoil called a parawing.