How Many Legs? Kes Gray (and Jim Field - the same team, completely!)
Winner. Get it. Read it. Memorise it. It is great for such a wide range of ages; pre-math learners, early math explorers, and competent mathmeticians alike -- all will find things to enjoy and investigate (the selected creatures are great for leg discussion, too!). In addition to the obvious math integration, this is packed with great rhymes and humour. Love the answers at the end (yes, answers, plural). NB: I would technically submit yet another possible solution, as squid (one is a guest) -- they don't have legs (8 arms and 2 tentacles), but 10 has been counted towards the total for one in attendance.