So here are a couple I recently tried. Although I must say, letting the kids do it their own way and not trying to pick at them to make it perfect was hard, I love that they had fun.
Personal Painted Canvas
I just took a small canvas and taped off a K for Kameron and let her paint whatever she wanted. When I pulled the tape off she wanted to paint in the K as well, which defeated my purpose, but I love that she loves it. So now she has personalized artwork for her room.