I'm not sure if this is an issue or not, but I was just wondering if it affects a child's back at all by sleeping on a bed without a box spring. Maybe I'm just used to a "regular" bed since I've had one all my life - but now that we'll be needing to decide on either bunk beds or two twin beds for our kids, I've been giving this some thought.

I haven't done any research on this yet. I just thought I'd throw it out there for discussion.

Thanks for your input!