I have lived in Rajouri Garden in Delhi till March, 2013. So i have a little experience about that area well. My children used to go in "Hello Kids Riddles pre school", at that time, i was found this school well according to my requirement and desired facilities as well. Apart from this school, you may get others preschools and day cares better than this.
These days, i live in Gurgaon city with my family and children goes to "MatriKiran" located on Sohna Road in sec-49.
We all are happy here.
:) :) :)