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Learners see that a carrot slice sinks in fresh water and floats in saltwater.

Learners make a counting/estimating jar to exchange with friends or bring home.

Learners see convection currents in action in this highly visual demonstration. Sealed bags of colored hot or cold water are immersed in tanks of water.

Learners act as engineers and design mini submarines that move in the water like real submarines.

In this activity, learners create a kind of balance device using a wire coat hanger, some string, and paper cups.

In this activity, learners explore density and buoyancy as they design and construct rafts.

In this activity, learners will build an air cannon out of simple materials you can find around the house. Although air is invisible to the eye, it is not by any means empty space!

In this math activity related to volume, learners use problem solving skills to calculate and build a model house for Minus the dog.