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See how many mice equal the weight of a big blue whale. See how many pigeons, standing on top of one another, equal the height of the Statue of Liberty. Quirky illustrations and fresh subjects help kids explore measurable attributes of a variety of things in a uniquely engaging way.
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See how many mice equal the weight of a big blue whale. See how many pigeons, standing on top of one another, equal the height of the Statue of Liberty. Quirky illustrations and fresh subjects help kids explore measurable attributes of a variety of things in a uniquely engaging way.