My oldest DD started pre-school a year early. She turned 3 in Dec., so I started her after Christmas break.
Technically, she was three so the school allowed it.
I called the director prior and said things like:
There is a new baby at home and it would be so good for her if she had something that was just for her.
She is very mature and gets along easily with other children.
Could we try it for a month, if it doesn't work, just call me, we'll take her back out no problem.
Of course it worked.

But the director had an out if it was a disaster, because for some kids it might have been.
