I believe you mean Ursynow area, there are a couple of preschools in the Pod Skocznią area with good reputations, they may be too close to the center for you if you want a place local.
Try contacting some of the schools on this list: ursynow.waw.pl/page/?str=502
Merged: Need information on schools in warsaw
I would request for your suggestion on getting information on schools in warsaw. I am planning to come warsaw in august, i have 2 daughters aged 9 and 3.6, please suggest some good school where mode of teaching is english and not very expensive.