Yesterday, when she found the notepad and pen that I accidentally left within reach, I let her play with it to see what she'd do with it. For the most part, she just scribbled on the pad. When she got bored, she scribbled on herself. She was totally supervised so she never even thought of the walls.
Today was a whole different ball game. I was in the kitchen washing dishes while Abby played in the cabinets. I suddenly realized she was no longer in the kitchen so I went looking for her and this is what I found! This is why we put childproof locks on the bathroom doors. Of course, they only help if I actually remember to lock them (which I usually do).