My friend has a 6yr old son and a 6month old girl and there all sharing one room is that legal or not?

You asked your question as a answer to another question that was over 2 years old. I am surprised anyone at all even noticed.

I have moved it.

There is no "law" there may be rules if the children and family services are investigating, their will be rules if these are foster kids. But families have to do what they can.