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In this activity, learners use the design thinking process to design and build their own aqueduct, or water bridge.

In this activity, learners explore and compare the buoyant properties of materials found in nature and in human-made materials.

An ordinary camera has a lens that makes an image on film. In a pinhole camera, a small hole replaces the lens.

This activity (9th activity on the page) about hearing demonstrates to learners the importance of having two ears.

This is an activity to do when there is a solar eclipse!

In this activity, learners use tonic water to detect ultraviolet (UV) light from the Sun and explore the concept of fluorescence.

In this activity, learners will make their own prism and use a glass of water to separate sunlight into different colors.

In this activity, learners construct speedy vehicles made out of paper plates and powered by twisted rubber bands.

In this activity, learners use binoculars (or a telescope) to identify and track sunspots. If using binoculars, learners need a pair that can be secured on a tripod.

In this activity, learners make their own solar oven to bake s'mores and learn about how solar energy is absorbed on Earth.

In this activity (on page 2 of PDF), learners create a low-tech refrigerator that requires no electricity to keep food from spoiling.

Learners follow directions to construct a solar oven that really cooks! The solar oven uses aluminum foil to reflect sunlight into a cooking chamber, which is painted black.

In this activity, learners work in groups to design a parachute out of household items that keeps an egg secure when dropped from a certain height.