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

This is a quick activity (on page 2 of the PDF under Butterfly Wings Activity) that illustrates how nanoscale structures, so small they're practically invisible, can produce visible/colorful effects.

In this fun, hands-on autumn activity, learners experiment to discover whether the colored substances in leaves can be separated from the leaves.

In this activity, learners will create an optical illusion top. Learners will explore color mixing, physics and design through this activity.

How many colors make black? Gather as many water soluble black markers as you can find.

In this activity, learners make a Benham Top to explore visual illusions and optics.

In this simple chemistry activity (page 1 of PDF under SciGirls Activity: Colorblind Dogs) about acids and bases, learners will mix a baking soda and water solution and use it to paint a message on a

In this activity, learners stain fabrics--on purpose!