A few ingredients: 1. Flying visit to Louvre to see the Giotto exhibition 2. A box of crayons lurking in bottom of overloaded bag 3. A fascinatingly textured East Coast placemat 4. An empty quiet carriage 5. A doodle to try out the crayons on the interestingly textured placemat, gradually taking on the form of a Giotto inspired face: those odd grey-green shadows emerging from the under painting. Not quite the same effect with wax crayons. But technical and aesthetic defic