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In this hands-on experiment, kids use chemistry to explore whether acids or bases are better at restoring a penny’s shine.

Learners investigate the properties of the liquids in two bottles. One contains layers of oil and water, and one contains oil, water, and soap.

In this activity on page 6 of the PDF, learners dissolve Epsom salt in water and discover that the resulting solution can be used to create a work of art.

In this activity, learners mix up a bubbly brew and examine density. Learners explore how they can make different materials fall and rise in water using oil, water, and salt.

Learners add different liquids (water, salt water, alcohol, and detergent solution) to water and observe the different ways the different liquids combine with water.

In this activity, learners are challenged to lift a floating ice cube out of a glass of water using just one end of a piece of string.

In two separate bags, learners mix water with Epsom salts and detergent.

In this simulation activity, learners observe what can happen when ocean waves churn up water and oil from an oil spill.

In this chemistry activity (page 1 of the PDF), learners will observe a physical change.

In this chemistry demonstration, learners investigate the rule "likes dissolve likes" by combining three, immiscible liquids to create a colorful density column.

This is a highly visual demonstration that illustrates both the effects of density and chemical reactions.

In this chemistry challenge, learners combine acids and bases in a universal indicator to create five different colors.

In this activity, learners explore the chemical reaction between water and effervescent antacid tablets. This hands-on activity models how a material can act differently when it's nanometer-sized.

How do you measure a bubble when it's floating? You can't really, but in this activity, learners can measure the diameter of the ring of suds a bubble leaves on a flat surface.

This activity shows you how to make amazing crystal spikes using Epsom salt and the sun.

Visitors observe a tray holding a crystal-covered brick. The crystals were created by evaporation of a solution containing liquid bluing, ammonia, and salt.

In this activity, learners discover how a cabbage juice indicator helps identify acids and bases, and how iodine indicates the presence of starch.

In this challenge, learners figure out how to make a juice stain disappear.

Visitors incrementally increase the amount of iodate in three different test tubes containing the same amount of a starch solution.

Learners are challenged to create solutions that conduct electricity and make a buzzer buzz (or an LED light up).