Purple, Green and Yellow by Robert Munsch is a funny, tall tale involving a little girl name Brigid and permanent markers. Brigid loves to draw. She uses regular markers, until she discovers she needs better ones. First she tries washable ones. Then, scented markers, incidentally my favorites from childhood. Finally, she asks her mom for super-inedible-never-comes-off-till-you're-dead markers.
Brigid gets her wish and uses the markers for good, until she gets tired of using paper for drawing. I won't give away the ending, but you might guess from the activity. One of Bobo's favorite past times is painting, stamping and coloring himself. This book is delicious. CHOMP!