So I'm sure lots of parents have this problem, but my kids have no concept of knocking on the door before coming into our bedroom. It seems to be one of those things that they need to be reminded of every morning and as the day goes on their memory gets foggier and foggier. I decided to make a couple of door knob hangers to gently remind small people to knock before entering (or to not knock and go away).
I got a couple of wooden door signs at Hobby Lobby (for a whopping $.47 a piece) and some cool scrapbook paper. A quick Google image search and some cutting and pasting in Word and there you have it. (The cloud paper is for my mother. I am forcing her to make her own. You may notice that there is no picture of her completed project...)
I figured while I was at it, I would make one for the kids' door. We have an open door policy in our house when it comes to their room, so there's no need for a "please knock" reminder. Instead, their sign lets them know if it's quiet time or play time. Hopefully this will help keep the peace when the baby (or Bijou on those rare occasions) is napping.