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Heat makes some materials expand, and it makes others shrink.

In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.

In this activity, learners thread gumdrops together to make a model of a polymer.

In this activity, learners discover that some plastics will shrink when you get them hot. Learners bake polystyrene in a regular oven and discover what happens.

Use grape juice, baking soda, water and vinegar to make acid and base indicator paper! This activity contains a recipe and instructions for the indicator paper.

How many colors make black? Gather as many water soluble black markers as you can find.

In this activity on page 14 of the PDF (Rethinking the 3 R’s: It’s Easy to be Green), learners turn plain pieces of recycled plastic into shrunken works of art.

No glue is needed for learners of any age to become marshmallow architects or engineers.

Learners explore soybeans, soak them in water to remove their coat, and then split them open to look inside. They also make a musical shaker out of paper cups, a cardboard tube, and soybeans.