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In this activity (12th on the page), learners investigate their ability to discriminate (see) different colors.

It's difficult to see convection currents in any liquid that's undergoing a temperature change, but in this Exploratorium Science Snack, you can see the currents with the help of food coloring.

Do grapes, yes the grapes from the grocery store, move in the presence of a very strong magnet?

In this physics activity, learners will investigate the strength of egg shells.

In this yummy chemistry activity which requires adult supervision, learners use sugar and water to explore how crystals form.

In this physics activity (page 14 of the PDF), learners gain a better understanding of how friction and mass affect objects by comparing the rotational inertia of raw and hard-boiled eggs.

Learners use their knowledge of color changes with red cabbage indicator to neutralize an acidic solution with a base and then neutralize a basic solution with an acid.

Learners mix a variety of substances with red cabbage juice. The juice changes color to indicate whether each substance is an acid or a base.

Learners observe a bottle containing water and oil. They are invited to pick up the bottle and mix the contents together.

In this hands-on activity (on page 2 of the PDF), learners experiment with lemon juice and paper to create a message that can only be revealed using chemistry.

Learners see that a carrot slice sinks in fresh water and floats in saltwater.

In this activity, learners heat and cool carbonated water to find out whether temperature has an effect on how fast the dissolved gas leaves carbonated water.

In this activity, learners explore the concept of permeability to better understand why amphibians are extremely sensitive to pollution.

In this dynamic activity, learners build a catapult that launches projectiles, such as marshmallows.

In this activity related to the human circulatory system (on page 10 of the PDF), learners observe the dispersion of a drop of food coloring in water, draw conclusions about the movement of dissolved