More ideas from Marianne
3 white canvas boards, 3 colors of paint (you could even use pink for a girl's room) and a simple drawing! :)

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 :)