Just a couple things of note, granted this may borderline on proofreading, so take it with a grain of salt if you like! (or sand, rather!) There was one typo I noticed on the first Number Note header. Also, this might be more of a personal taste, but I think some more exclamation marks on the more action heavy pages might be good to add a little extra energy to the story portion of the book. The examples that come to mind first being the thunderstorm cloud. (for example, “The lightning flashed and thunder BOOMED!”) or when Pebbles gets picked up by the eagle (…”Pebbles cried!”) That punctuation can also help influence the way it could be read out loud as well, thus making it more engaging to a group of small kids listening to the story. They’re invested, and the science and number facts suddenly have that much more weight and potential impact. This is THE biggest number after all!