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Plants need nutrients to grow. This is why we apply fertilizers to grass and food crops. In this activity, learners will explore how fertilizers can affect lakes and other bodies of water.

Some aquatic organisms live in open water, while some live in soil at the bottom of a body of water.

Millions of organisms can live in and around a body of water.

This activity has learners interacting with live crayfish, but could be adapted for a variety of similar hardy and interesting organisms.

Although we may not admit it, all humans fart or pass some gas. In this activity, learners make their own model to mimic food passing through intestines and discover what releases gas.

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.

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

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

In this activity, learners look at and touch marine animal skulls to compare them and think about what they eat.

In this outdoor, beach activity, learners use tennis balls, water balloons and other simple devices to investigate the movement of waves and currents off a sandy beach.

This is a guide for facilitating interaction at a touch tank with marine animals. The instructions are for setting up a display in an informal science center, but could work anywhere.

In this card-based personal choice activity, learners review and sort COVID-19 and vaccine science information.

In this activity, learners observe fly behavior and then build a flytrap.

In this activity, learners cut out and assemble wheels to explore how variations in fish body structures (mouth shape/position/teeth, body shape, tail shape, and coloration patterns) allow fish to sur

Learners use Duplo bricks to build antibodies with shapes that match model viruses.

In this two-part outdoor activity, learners conduct a population census of squirting clams on a beach or mudflat, and investigate the clams' natural history.

Learners make self-assembled polymer spheres as a model for the lipid nanoparticles found in COVID-19 mRNA vaccines.