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

Learners observe a flask with a balloon attached over the mouth and inverted inside the flask.

Learners work in groups to construct bridges using stale marshmallows and toothpicks.

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.

In this activity, learners combine two substances (plaster of Paris and water) to make a cast of an object's imprint in clay.

Learners build a filter from old soda bottles and dirt. They create polluted water, and pour it through their filter to clean it.