Remember Scratch Art? Many of us enjoyed revealing the rainbow colors hidden beneath smooth, dark paint.
Simply color (hard!) on a piece of heavyweight paper with Clementine natural crayons until the whole sheet is covered.
Paint a layer of dark blue, black or purple paint over the crayon and let dry.
Unfold a metal paperclip or use a wooden skewer to scrape a design into the dried paint with a crayon layer underneath.