This is a great idea for any sort of DIY artwork: trace a simple graphic onto three canvases, and paint. So much more esthetically pleasing than if you were to just trace and paint onto one canvas. Plus i love the whale idea for a little boy room :)
I'm going to do a frame collage like this for the living room. Not sure yet if I want the frames to be all the same color or not. Some will have pictures in them and some will have personally crafted pictures/collages.