re: Is pre k 3 too early for school?

If you're still looking at immersion schools, then usually the earlier they start the better, although my girls picked up the languages fine starting in pre-K/Kindergarten. (Apologies if I'm confusing you with another poster and you have no idea what I'm talking about!)

One other advantage to starting a regular school that early is that the pre-K 3 and 4 classes often feed into the Kindergarten classes, so if you're looking at a school with a high demand or waiting list for their Kindergarten classes, see if starting them at the school earlier would guarantee them a K spot.

But if you're happy with the daycare, and these things aren't a consideration, stay put. Most quality daycares do teach them basics through play, and as someone above pointed out, you won't have to worry about finding someone to care for them during school vacations.