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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.

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

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.

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

In this activity, learners explore a bucket of sand and beach objects.

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