Here is an example of a more playful sitting room.

You can create seperate spaces in an open area. You could put a game table in front of the large window. Add a popcorn machine and create a snack bar. In the TV area you could go with a cinema theme and put a movie reel on the wall and some framed movie posters. Bring in a bean bag chair.

Thanks, yes was definitely thinking bean bag chair or chairs for the kids.