hm,... that´s a very good question
I know how to "design" a Kindergarten in Germany , but no clue about how to do this in India.
So first i would go to the library/office and copy some page´s from a Book called "Neufert Bauentwurfslehre" / "Neufert Architects Data".
When I rember right there you can find a lot of helpful advise and some very good examples.
Well the first thing to think about is how many children will be there.
How old will these kids be ? and how many of them are in one group ?
Also importend is if any other room´s are needed ? like office , kitchen, WC, Storageroom and so on. You have to thing about a playground too.
When you got this facts ready , you can try to fit then on the plot you have .
In a nice way , grouproom and playground in the south (Germany!) .
Secondaryrooms and parking in the north. if it does not fit you might need a second floor , ....that where the real fun starts ,...
Safty is very very importend, building for children is not easy ,
electric socket , switches, safty glas , nonslippery floors, avoiding sharp corners,keeping the kid away from the parking area and the traffic....the list is very very long ( almost endless ) .
Hope this is helpful (?)