Hi,
I have a home daycare, and the most important quality in a book is if you like to read it. So don't buy a book until you have read it completely. Also, children like books that have rhythm and rhyming in them. (These are more fun to read to them out loud) They also like surprise endings - and believe me, they are surprised EVERY time you get to the ending even if you think that you can't stand reading it even one more time.
PS Congratulations on the new grandbaby. Babies are such a blessing!!
Tori