N.O.
My Urban Toddler in Saline.
(http://www.myurbantoddler.com/t-Play.aspx)
I can't say enough good things about this place. It's age-appropriate, the staff is very warm and courteous, and it's well-maintained and clean. I've been taking my sons there since they were 17 months old and they love it -- and we even drive all the way from Northville to get there. It's set up like a toddler-sized city, so the kids can wander around and play in the firehouse, school, grocery store, etc. And as a mom, I appreciate that I can relax and watch them without interfering in their play due to the way it's set up.