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In this chemistry demonstration, learners observe a chemical reaction that produces a colorful effect.

Learners write their initials by applying different clear "magic ink" solutions to separate pieces of paper and then "develop" the inks with other clear solutions.

Learners mix vinegar and baking soda together in a bottle to create a chemical reaction. The reaction produces a gas, carbon dioxide, which inflates a balloon attached to the mouth of the bottle.

This hands-on activity demonstrates how a material can act differently when it's nanometer-sized.