Amber taught me about using white crayon and watercolors "Magic Art," but it was my own idea to create mysteriously reappearing ghosts for Halloween.
To create this spooky effect, draw a ghost with white crayon on white paper. Color it in. This is harder than it sounds, so you may have to do it for the child.
Have the child paint the entire sheet of paper.
If she is feeling particularly spunky, she may paint it varied colors. It does not matter -- so long as she covers the entire picture with paint, the ghost will magically appear.
The kids LOVED watching the ghosts appear as they painted. We will definitely do this again. Maybe I will write secret messages for my emergent readers?