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The Ancient Egyptians used a naturally-occurring salt from the banks of the Nile River, called natron, to mummify their dead.

In this activity, learners explore atoms as the smallest building blocks of matter. With adult help, learners start by dividing play dough in half, over and over again.

Learners work in groups to construct bridges using stale marshmallows and toothpicks.

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