Such a good idea as a gift for grandparents. Put a phrase or message in vinyl letters on a clean canvas. Have your child paint a picture on top, then peel the vinyl letters off to reveal the message underneath.
Print a picture, spray paint a piece of wood black, cut picture to match size of wood. Coat wood in Mod podge then lay picture on top. Once it has dried thoroughly, use sandpaper to rough up the edges, then put a layer of mod podge over the picture.