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In this activity, learners play a card game that explores different size scales--macro, micro and nano.

In this activity, learners play a card game that explores the relative sizes of various objects. Learners compete to organize their hand of cards into lists of objects from largest to smallest.

This fun and simple hands-on astronomy activity lets learners build a scale model of the universe with little more than adding machine tape.

This is a classic exercise for visualizing the scale of the Solar System.

Learners make their own simple slide rules out of paper and learn how they work.

In this activity, learners mark their height on a height chart and discover how tall they are in nanometers.

This simple activity uses paper and scissors to convey two key concepts to learners: the nanoscale is very small and working on the nanoscale requires special tools.

This game introduces learners to the scale of the greenhouse gas problem, plus technologies that already exist to dramatically reduce our carbon emissions and prevent climate change.