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In this activity, learners create a mixture of water, alcohol and permanent marker ink, and then add salt to form a colored alcohol layer on top of a colorless water layer.

This activity explores the basic workings of a siphon, which is the core technology that makes toilets work.

Learners design, build, and test models of "dragon boats" made from up to three milk cartons.

Learners make a simple battery out of "sandwiches" of aluminum foil, pennies, and a salt water-soaked paper towel.