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How do you measure a bubble when it's floating? You can't really, but in this activity, learners can measure the diameter of the ring of suds a bubble leaves on a flat surface.

Put math of measurement into lining up — and make waiting in line fun. Choose a size characteristic that learners can physically compare, such as foot length or hair length.

In this activity, learners will construct a measuring device (snake "string") to improve their observation skills.

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