I LOVE this idea I found on Tutu's and Turtle's blog :(http://tutusandturtles.blogspot.com/2009/07/free-hand-wallpaper.html,
I just had more photos of the kids taken, and was running out of space to put them all in frames, so this idea is awesome for adding in photos as you go, using all the space in the hallway!!
Not quite done, (I keep walking by and doodling some more!), but so far, I love it, there's such a simple childish pleasure in drawing on the walls!