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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 online activity, learners experience the thrill of pickle making, and explore how a cucumber becomes a pickle.

This activity shows you how to make amazing crystal spikes using Epsom salt and the sun.

This activity about density provides instructions for making a miniature "lava lite" with just salt, oil, water, and food coloring.