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Some bugs can walk on the surface of a lake, stream, river, pond or ocean.

This quick demonstration (on page 11 of PDF) allows learners to understand why scientists think water ice could remain frozen in always-dark craters at the poles of the Moon.

Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

This activity uses Jell-O(R) to introduce learners to microfluidics, the flow of fluids through microscopic channels.

In this activity (on page 5 of PDF), learners use dry ice and household materials to make scientifically accurate models of comets.