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

In this activity, learners act as water molecules and travel through parts of the water cycle to discover that it is more complex than just water moving from the ground to the atmosphere.

In this activity, learners explore the concepts of natural selection and observable traits in a game that can be played at home.

In this activity, learners explore why humans sweat. Learners compare the effects of heat on a balloon filled with air and a balloon filled water.

This activity is designed to accompany the PBS documentary about African-American chemist "Percy Julian: Forgotten Genius." Learners look through two cups with small holes in them to simulate what it'

This is an online Flash game where learners can experiment with ballistics and how to compensate for the varying levels of gravity found on the planets of our Solar System.

In this group activity, learners will explore the characteristics, functions and uniqueness of the mangrove tree.

In this activity, learners will simulate the processes of the water cycle at home in a plastic sandwich bag.

In this physics activity (page 10 of the PDF), learners will explore how energy from moving water can be used.

In this activity, learners act out the flow of blood in the human body! A great way to get learners up and moving while learning about the circulatory system.

In this online Flash game and spacewalk mission simulation, learners are challenged to repair parts of a space station while balancing their oxygen and fuel use carefully.

This is an online simulation of how sound changes due to environment. How does place--like a cave, a pier, or a forest--affect certain sounds?

In this activity, learners play a game to simulate the food chain.

This game plays a dozen different sounds, altered to simulate what they would sound like if you had hearing loss.

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

Experiment with friction and make bearings for a whirligig! This activity is a nice introduction to friction and bearings and demonstrates why bearings are useful for spinning.

This activity introduces learners to wolf behavior and communication.

This fun and simple hands-on astronomy activity lets learners imagine what would happen if our Sun were replaced with a black hole.