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In this activity, learners design a crushing test and discover that identifying and controlling the variables may be difficult.

In this simple activity (on page 2 of the PDF), learners make a crystal garden using salt, water, and a brick.

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

Construct a simple battery that's able to power a small light or motor out of foil, salt water, and charcoal. A helpful video, produced by the Exploratorium, guides you along on this activity.

Don't scream for ice cream -- make it with milk, sugar, flavoring and some 'salt-water' ice. Discover the chemistry of ice cream by creating your own.

In this chemistry activity (page 1 of the PDF), learners will observe a physical change.