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Interactive
Other

University of Kansas: Quarked!: How Tall Are You?

For Students 3rd - 5th
Enter your height using inches or meters, and see how tall you are in units, from as tall as the Statue of Liberty and an elephant, down to atoms and quarks. Next, see if you can put the Quarkster characters and yourself in order by height.
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Interactive
Other

University of Kansas: Quarked!: Ushi's Ruler Game

For Students 3rd - 8th
See how many times a paper ruler must be cut in half before it reaches the size of a quark.