When faced with the umpteen coloring books scattered around the apartment, I sometimes get the compulsion to color in them, but I always use trippy colors. So, when confronted with a zebra in a coloring book, rather than black and white, I opt for some trippy hues. When seeing a tree, I make it purple, or yellow, or whatever color hits at the moment. I like making whole scenes where the colors of everything are off. Then, when my boys get around to nosing through'em, they see those and are like "What the-- ?? Daddddddy!"