I buy PG furniture for my home because I'm a kid avi and have an SL family. I find a lot of 'PG' furniture still isn't really appropriate for kids even if the more adult stuff is removed.
If you want to see PG furniture done correctly then have a look at AR Status. They have furniture which can sit up to four people (2 adults and 2 kids, with poses and animations where you can sit and watch TV together, or do daft things like have pillow fights, play patty cake etc. Basically fun things a real family would do together.