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In this activity, learners build a hot air balloon using just a few sheets of tissue paper and a hair dryer.

In this activity, learners make a 3-D model of DNA using paper and toothpicks. While constructing this model, learners will explore the composition and structure of DNA.

In this activity, learners make bridges using an oil-based modeling clay (plasticene). The instructions include discussion questions for both before and after bridge building.

In this activity, learners will build a roller coaster for a marble to run on using everyday household materials such as paper towel or toilet paper rolls, cups, boxes, books, buckets, chairs, etc.

In this activity, learners build a bird feeder or feeders to attract birds for observation.

Learners make a mobile model of a carbon atom using clay, wire, and pipe cleaners.

Learners build a model of the planets in the solar system. In their model, the planets are spaced in their relative distance from the Sun.