DD is 23 months and has just gone her 2nd day in a row, and 3rd this week without an afternoon nap (instead she dropped off in her pram 5 minutes before we got home but then woke up and was full of beans). Yesterday evening she was very strung out, today is a bit better. I'd expected her to carry on with her nap for months yet, without having thought about it much. Is this about the right age for her to drop it?