A mathematical magician helps readers conceptualize a million, a billion, and a trillion. Other segments include: Really big numbers: LeVar explores ways of counting large numbers as he talks to people who share grouping and estimating techniques ; How crayons are made: a visit to the Crayola Crayon Factory shows how crayons are made and talk about the large number of crayons they handle in their jobs ; Football estimation: a visit to Giants Stadium...