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

In this sensory activity, young learners explore chemical reactions by making their own play dough from home.

Use grape juice, baking soda, water and vinegar to make acid and base indicator paper! This activity contains a recipe and instructions for the indicator paper.

In this challenge, learners have to figure out in what order to combine five solutions to change the color from clear, to yellow, to blue, and back to clear.

In this activity, learners separate a mixture of pebbles, salt crystals, and wood pieces. They add water and pour the mixture through a strainer.

Learners write or draw with white crayon on white paper. They look and feel to detect their marks on the paper. Then, learners paint over their paper with watercolor paint.

In this activity, learners will "paint" their own crystal artwork by creating a picture with a super saturated salt solution.

Learners mix a solution of luminol with hydrogen peroxide to produce a reaction that gives off blue light.