Illustration by Jennifer Healy: when drawing white or light-colored objects with colored pencils (like fair, wispy hair), try using darker colored paper. Jennifer Healy uses Stonehenge paper in this portrait piece.
Julian Beever is an English artist that creates surreal chalk drawings on pavement surfaces. His art is sometimes so convincing that people avoid potholes he has drawn on a pavement. His nickname is "the pavement picasso". His chalk art can take.