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Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small.

In this activity, learners will explore the ways natural materials can produce sounds. Appropriate for any age, learners can make individual music or create a symphony with others.

How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?

In this activity, learners use found natural materials to create a water haven for bees and other insects.

In this activity, learners will create a home for animal friends in their backyard using recycled materials. Some material suggestions include: pine straw and twigs.

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

In this activity, learners observe hard parts of sea creatures (shells, molts, etc.) to better understand marine environments.

Glare from the sun and ripples from the wind can make it hard to see what's below the surface of a body of water.