Charlie has started asking us to read books to him in the evening. The problem is that he's never satisfied and always wants to read "one more" book.

I try to tell him that we're only going to read 2 more books, 1 more book, then we're done... but I think his knowledge of numbers is too weak to really understand what that means.

How do you let your LO know that there's a limited number of books you will read, and then it's time to sleep?