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In this activity, learners explore the different salinities of various sources of water by taste-testing.

In this biology activity (page 3 of the PDF), learners will explore how plants turn sunlight into food through a process called photosynthesis.

In this activity, learners explore how nanosized structures can create brilliant color.

In this activity, learners explore how salt water freezes in comparison to fresh water.

The goal of this activity is to design, build and test a house or toy for an animal.

In this activity, learners discover if carbon dioxide has an effect on temperature.

In this activity, learners explore the behavior of cold-blooded animals. Learners discover what happens when they change a fly's temperature.

In this quick and easy activity and/or demonstration, learners use two empty 2-liter bottles and hot tap water to illustrate the effect of heat on pressure.

In this activity, learners explore the possibilities of clay as a natural material.

This activity gets learners looking at 6-sided shapes in nature, including the cells of a beehive, as well as other shapes.

Learners experiment with a commercial photo-sensitive paper (Sunprint® or NaturePrint® paper). They place opaque and clear objects on the paper and expose it to bright light, observing the results.

In this activity, learners will explore the ways natural materials can produce sounds. Appropriate for any age, learners can make individual music or create a symphony with others.

In this engineering activity (page 3 of PDF), young learners investigate how a pole can be made stable by “planting” its base in the ground or adding supports to the base.

In this activity, learners explore the concept of permeability to better understand why amphibians are extremely sensitive to pollution.

In this activity, learners explore how and why rainbows form by creating rainbows in a variety of ways using simple materials. Learners create rainbows indoors and outdoors.

In this activity (located at the top of the page), learners make an easy river strainer and see what they can catch.

This activity is a sensory experience that recreates the sounds of a pond at night.

In this activity on page 24, learners perform experiments to examine whether or not trash can float, blow around, or wash away.

This activity investigates how bark beetles can threaten forests by having learners estimate the number of infected trees from a photo.

In this activity, learners conduct an experiment to explore how water flows up from a tree's roots to its leafy crown.