A.L.
I think full-day pre-k is a bit much unless both parents are working. There should be a nap/rest time, though. Another thing to consider: how long a day will he have for kindergarten? Some schools are going to full day kindergarten, and some aren't. If he's only going to have half-day kindergarten, do you want him going all day to preschool? Does this same school not offer a shorter day also? Decisions, decisions!