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In this activity, learners investigate color vision as well as plan and conduct their own experiments.

In this activity, learners examine baking powder, a combination of three powders: baking soda, cream of tartar, and cornstarch.

In this activity, learners investigate and compare the rate of drying in different conditions.

In this activity, learners will estimate the sizes of balls to learn how to estimate the size of hail. Learners will compare their estimates to the estimates of their peers and the real measurements.

Learners compare the weight of equal volumes of wax, water, and clay. Learners discover that since the wax weighs less than an equal volume of water, it is less dense than water and will float.

Learners will compare the growth rate and appearance of crystals forming on small rocks to those growing on miscellaneous objects. Learners will also investigate how temperature (warm vs.

In this outdoor biology and math activity, learners estimate the size of a population of organisms too numerous to count.

In this activity, learners will conduct an open-ended survey, and then organize and analyze results. What languages does everyone speak? What’s the most common? the least common?

This is an activity (located on page 3 of the PDF under Water Clean-up Activity) about the use of reduction agents to decontaminate ground water.

In this activity, learners investigate the properties of different types of balls.

In this family or group inquiry activity, learners use their senses to explore a local forest or woodland.

In this activity, learners confront their perceptions of gravity in the solar system.

In this outdoor beach activity, learners use a variety of "beaks" (such as trowels, spoons or sticks) to hunt for organisms that shore birds might eat.

This is an activity (located on page 4 of the PDF under Surface Area Activity) about surface area and reactivity.

This is an activity which will allow learners to gain an understanding of lemur behavior through observation and role play.

In this activity (page 2 of PDF under GPS: Glaciers Activity), learners will measure the rate at which water streams out of a leaky cup.

In this optics activity, learners explore how many objects they can see in a set of mirrors (hinged like a book) at various angles.

In this online Flash game, learners will explore a coral reef using an underwater remotely operated vehicle (ROV).

In this design challenge activity, learners use a balloon and other simple materials to design an air-powered rocket that can hit a distant target.

In this activity related to the human circulatory system (on page 10 of the PDF), learners observe the dispersion of a drop of food coloring in water, draw conclusions about the movement of dissolved