Amax, I have been on a waiting list for over a year now, have one child myself, and most recently contacted them to see if any units are/would be soon available.
First off - the lady I was in contact with was awesome! So very nice, and informative.
Secondly - at this time, there were no units available. I have since found other accommodations.
The units that have a yard are either one bedroom (loft style) or 3 bedroom. The rate (from last I was aware) was around $750 or more. You had to have an additional $800 to enter into the Co-op portion.
However, as it has been a long time since discussing rent & Co-op rates with them, I would highly suggest getting in touch and making an application.
Although it may take some time, and you are on a waiting list for awhile, it may be worth it in the end. Especially if it is a place where you really want to live.
Good luck!