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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.

In this crafty chemistry activity (on page 2 of the PDF), learners make their own paper from used paper they may have otherwise thrown away.