Do you use a baby monitor for your child?
We always had a baby monitor in DD's room. When I was preg with #2, we transitioned DD into a big girl bed, and I bought a video monitor to keep an eye on her - I knew we'd use it for the new baby anyway.
We did put the regular (sound) monitor back in my 3.5 year old's room. She can get in and out of her room on her own (like to pee, or in the morning, etc), but there have been times I hear her coughing all night or starting to cry so we will go in her room to check on her. (I don't leave the door open because it almost looks into our room, so it wouldn't make sense to).
Re: Baby monitors
We still use ours, too.
I plan to tell DD it's a smoke detector.
LOL at both of these! Yep, we still use our video monitor too.