"When Mr. Cantello's fourth graders see a strange date written on the board, they learn that Mole Day is coming soon...but what is a mole? And what does it have to do with their science class? In this fun and accessible explanation of Alvogardro's number, six inquisitive kids use the power of their curiosity to put together a Show and Tell like you've never seen beflore."-- Page 4 of cover.
