Isn't this such a sweet idea?? I think I originally came across it a year ago here, and I just finally got around to putting it together. It took about 5 minutes. I did have to buy the frames first, but I ended up already having one, so that was helpful. After I designed them in PSE I just printed them on cardstock and put them in the frames. I use a dry erase marker and write the love notes directly on the glass. It's so fun to read them to the girls each time we go in their rooms. Lila likes to point to the frame and say "I love you cause!" whenever we walk by. When I first read the whole thing to her she repeated "I a good helper!" in such a proud little voice. So sweet. I've been changing it after I know they've heard it a few times. Luckily there's a hall closet right between their rooms, so I keep the pen and eraser stored in there for easy access.
Our hallway is really dark, so they were hard to photograph, but this is what they look like outside the girls' rooms. I think they're a really meaningful way to fill up the blank space! I've included the art below in case anyone wants to print their own. I think you can just save it to your computer!