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In this weather-related activity, learners make a portable cloud in a bottle.

In this fun gardening activity, learners discover their soil type. There are three basic soil types: sand, silt, and clay.

With a coffee filter, a black marker, and a cup of water, discover the secret colors hidden in black ink.

Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.

In this hands-on botany activity, learners sprout vegetables in film canisters.

This Exploratorium activity can be used in many contexts because geysers are great opportunities for learning about heat and temperature changes as well as geological/space science phenomena.

This activity demonstrates liquefaction, the process by which some soils lose their solidity during an earthquake.

In this activity, you'll use a straw, a water bottle and a paper tube to make an instrument that's very much like a saxophone.

This activity is an investigation of static electricity. What happens when you get "static cling?" Basically, you pile up electrons on one thing, which attracts the protons in something else.

In this activity, learners light an LED with five cents. Learners use two different metals and some sour, salty water to create a cheap battery.

In this optics activity, learners examine how a transparent material such as glass or water can actually reflect light better than any mirror.