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This is a simple and fun activity for learners to explore water and colors.

In this activity, learners will use Google Sky to observe features of the night sky and share their observations.

In this activity, learners explore the different salinities of various sources of water by taste-testing.

In this activity, learners working in pairs saturate a cotton ball using water drops from an eyedropper to demonstrate the high water capacity of clouds.

In this two part activity, learners become draft detectives by constructing their own draft catchers to detect drafts around windows or doors.

In this up-cycling activity, learners recycle plastic bags and repurpose them into useful wallets.

In this activity, learners explore how nanosized structures can create brilliant color.

In this sensory activity, learners enjoy the fun of a snow day any season of the year.

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.

In this activity, learners make their own "tornado" using two soda bottles and water.

In this activity, learners will experiment with changing flower colors. Learners will investigate the effects of acids and bases on flower colors.

This activity investigates how bark beetles can threaten forests by having learners estimate the number of infected trees from a photo.

In this activity, learners will see how UV light affects colors over time by making their own sunprint on construction paper.

In this activity, learners separate materials based on their special properties to mimic the way recyclables are sorted at recycling centers.

In this activity, learners investigate soil erosion. Learners set up a simulation to observe how water can change the land and move nutrients from one place to another.

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

"Nature of Dye" allows participants to create their own dyes and art while exploring how chemicals interact and how these interactions can have real-world applications.

In this activity, learners will use static elecricity to bend a stream of water without touching it. Learners will explore physics and cause and effect through this activity.

In this activity, learners use gumdrops and toothpicks to model the composition and molecular structure of three greenhouse gases: carbon dioxide (CO2), water vapor (H2O) and methane (CH4).

This is part 2 of the three-part "Crayon Rock Cycle" activity and must be done after part 1: Sedimentary Rocks. In this activity, learners explore how metamorphic rocks form.