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By building a simple watershed with paper and markers and then using a spray bottle to simulate precipitation, learners will understand how pollution accumulates in our water sources, especially from

In this optics activity, learners examine how polarized light can reveal stress patterns in clear plastic.

Cool off in the heat with this project! Learners use simple materials to build a fan that runs on a motor.

In this long-term activity, learners make a home for a colorful community of microorganisms.

In this hands-on activity, learners investigate the functional design of leaves on a tree.

In this health, cooking, and math activity, learners explore nutrition and examine nutrition labels.

In this trick, hold your hand over a burning candle without getting burned, by reflecting and transmitting the light of two candles. This activity is best suited as a demonstration.

In this activity (on page 7), learners explore the meaning of a "carbon sink." Using simple props, learners and/or an educator demonstrate how plants act as carbon sinks and how greenhouse gases cause

In this activity, learners use coverslips to collect organisms from a pond, estuary or marine environment and then examine what they have caught with a microscope.

In this activity, some learners pretend to be wolves, while the other learners pretend to be the prey of the wolf. The goal of the simulation is to have the wolves work together to survive.

In this activity, learners conduct the "Stroop Effect" test and explore what happens when they try to complete two simple tasks at the same time.

In this activity, learners will conduct an experiment to discover methods of reventing foot mold growth on food.

In this activity (on pages 19-21 of the PDF) learners observe mold growing on potatoes. Preparation for this activity has to start a week before, to allow time for the mold to grow on the potatoes.

In this experiment, learners will conduct chemical and physical tests to identify mystery substances.

In this activity, learners investigate soil erosion. Learners set up a simulation to observe how water can change the land and move nutrients from one place to another.

In this tasty activity, learners make their own ice cream any day of the year in an exploration of heat and cold. Highlights include freezing and melting and the transition from liquid to solid.

In this activity, learners will make fish cutouts that propel through the water with the help of surface tension.

This online simulation game explores the different consequences of water levels on the Columbia River in the Pacific Northwest.

In this activity, learners will create a diagram of the ocean zones and determine what organisms live in each zone.

In this delicious activity, learners get to make, taste-test and compare their own "brands" of homemade strawberry ice cream.