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Learners explore the Bernoulli effect by building an airfoil (airplane wing) and making it fly.

This quiz lets you estimate your annual radiation exposure.

Learners add two dyes to mineral oil and water, and then compare their miscibility (how well they mix) in each.

This game depicts a woman going through her day, faced with various loud sounds.

Learners gain an intuitive knowledge of the physical aspects of watersheds by creating their own watershed models.

Learners investigate an iron-fortified cereal by stirring it with a strong magnet. They discover that metallic iron is present in some cereals.

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

During this activity, learners will make different versions of "ooze" using varied proportions of detergent and glue.

In this activity, learners will model the mechanical weathering and erosion of rocks in a stream or river.

Learners observe a bottle containing water and oil. They are invited to pick up the bottle and mix the contents together.

Learners make their own simple slide rules out of paper and learn how they work.

In this activity (on pages 49-54 of PDF), learners play with tangrams, a set of triangles, squares and a parallelogram that can combine into a larger square as well as all sorts of other shapes.

Learners explore how recyclers take advantage of the different properties of materials, such as magnetism and density, to separate them from a mixture.

Learners use filter paper and water to analyze six different markers. They mark the paper with ink, and dip the paper in water. The water travels up the paper and dissolved ink travels with it.

This game presents you with several different choices you can make in the course of your everyday life to increase your level of physical activity and be healthier.

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

Learners use a commercially available toy to experiment with density. They fill a chamber in the toy submarine with baking powder and release it into a tank of water.

Learners mix a solution of luminol with hydrogen peroxide to produce a reaction that gives off blue light.

In this activity about encryption, learners cut out a secret decoder badge from a handout and use it to encode messages to each other.

Learners compare the properties of two balls that appear identical. One ball bounces, while the other ball "thuds." The “bounce” ball is made of the polymer polybutadiene (-C4H4-).