We checked out 365 Penguins by Jen-Luc Fromental last week and have been reading it every day. Be warned, it is not just a cute penguin tale, it's actually MATH.
Yeah. The title probably should have given it away, but I had no idea. Penguins start showing up one a day for an entire year and there are lots of calculations going on relating to how many they have, how much food they eat, how to organize them, etc.
My favorite part is when they build a card-catolog-ish crate to keep them in. I also really enjoyed the illustrations and colors.
Have you read this one or any of the others by the author? It seems there are three more.
What are your favorite number/math books?