My rat had babies Oct. 1

I didnt even know she was preggo. Anyways, so i havent had time to really research like I usually do. When "holding" the little pink babies and such, how should you go about that? Just hold them and talk to them? For how long? I dont wanna stress the mother, but I want these guys to grow up friendly so they have a better chance of finding a loving home.

and how do you progress with the handling?
Any help is much appreciated...