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In this activity (on pages 25-32 of PDF), learners make models of the inner ear out of pipe cleaners.

Learners explore the Bernoulli effect by building an airfoil (airplane wing) and making it fly.

In this activity, learners discover that there is space between molecules even in a cup "full" of water. They first fill a cup with marbles, and then add sand to fill the gaps between the marbles.

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

In this activity (on pages 25-31 of PDF), learners soak sponges with different amounts of plaster of paris to simulate different levels of calcification in bone formation.

Learners gain an intuitive knowledge of the physical aspects of watersheds by creating their own watershed models.

In this experiment, learners design and build a model room in a shoebox and furnish it with tiny furniture.