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In this activity, learners explore moving air and the physics of lift and drag by constructing homemade wind tunnels.

This activity encourages visitors to build an electroscope—a simplified version of one of the tools scientists use to study the invisible forces on Earth and in space.

"Molecules in Motion" explores how materials behave and change in a vacuum.

In this activity, learners explore sound by constructing an instrument using some metal pipes, rubber bands, and a baseboard.

Everybody loves messy science, and Flubber is a favorite of both COSI employees and guests!

In this activity, learners play with surprising sand that doesn’t get wet! Learners explore how water behaves differently when it comes in contact with "magic sand" and regular sand.

In this activity, learners observe hard parts of sea creatures (shells, molts, etc.) to better understand marine environments.

In this activity, learners use transparent tape and polarizing material to create and project beautifully colored patterns reminiscent of abstract or geometric stained glass windows--no glass required

In this activity, learners use various dress-up or costume pieces to play a game of change.

This fun and simple hands-on astronomy activity lets learners experiment with a bucket, stretchy fabric, marbles, and weights to discover some basics about gravity.

In this activity on page 7 of the PDF, learners experiment with the interesting designs that can be made by painting on plaster.

In this activity, learners play an active version of freeze tag based on predator/prey relationships.

This activity introduces learners to the structure and properties of carbon nanotubes.

In this game, learners explore the different sizes of things in the world. In this Twister-like game, learners must place a hand or foot on a circle of the right scale - macro, micro, or nano.

In "Chemistry Makes Scents," participants use their noses to distinguish between chemicals with very similar structures.