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In this activity, learners will reuse plastic bags in an interesting way.

In this activity, learners collect, categorize, weigh and analyze classroom trash and discuss ways that engineers have helped to reduce solid waste.

Learners will follow a specific process to make their own paper using scrap paper, newspaper, or junk mail.

In this activity, learners build one or more edible coral polyps and place them together to form a colony.

In this Energy and Environment activity (page 9 of the PDF), learners calculate the mass of a piece of gum, compare it to the mass of the gum's packaging, and then create a bar graph of the results.