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Our bodies produce snot, or mucus, that we blow from our noses. In this activity, learners will create a model of how snot works and will explore how it keeps our bodies healthy.

In this activity, learners make their own solar oven to bake s'mores and learn about how solar energy is absorbed on Earth.

Some animals can swallow food whole, but humans have to chew. In this activity, learners will investigate what saliva does chemically to food before we even swallow.

In some parts of the world, lakes freeze during winter. In this activity learners will explore water’s unique properties of freezing and melting, and how these relate to density and temperature.

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

Many germs spread by our hands, and often times, people don't wash their hands well enough to get rid of germs.

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.

Learners will explore the concept of angular distance, and investigate why the moon appears to be the same size as the sun during a solar eclipse, despite the sun being much larger.

In this craft activity, learners create a string of cut-out moons and stars.

In this activity, learners use tonic water to detect ultraviolet (UV) light from the Sun and explore the concept of fluorescence.

In this activity, learners use binoculars (or a telescope) to identify and track sunspots. If using binoculars, learners need a pair that can be secured on a tripod.

When it rains, water can collect on top of and seep into the ground. Water can also run downhill, carrying soil and pollution with it.

In this activity, learners make their own Sun tracker to explore how ancient civilizations around the world studied the Sun.

Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.

In this outdoor activity, learners cut through and investigate rotten logs and then make log-profile puzzles for each other.

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

In this activity, learners make their own pinhole viewer in order to measure the size of the sun.

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

In this activity, learners use candy pieces and a cookie to make an accurate model of the Sun they can eat. Parts of the delicious model include solar granules, sunspots, and solar prominences.

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