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In this activity, learners cut out a fish and then "paint" it using universal indicator and acids and bases.

In this activity, learners investigate diffusion by creating underwater "fireworks" using food coloring, oil and water.

Making liquids of different densities to perfectly lay on top of each other can be a frustrating exercise. The Exploratorium created this activity as a fool proof way of making a density column.

In this chemistry challenge, learners combine acids and bases in a universal indicator to create five different colors.

In this activity, learners discover how a cabbage juice indicator helps identify acids and bases, and how iodine indicates the presence of starch.

This is an online exhibit about color perception. Learners set a random background color and then try to mix red, blue, and green light to match.