Of the two powerful instincts which exist in all human beings and which can be used in teaching, says Gilbert Highet, one is the love of play. ”The best Renaissance teachers, instead of beating their pupils, spurred them on by a number of appeals to the play-principle. They made games out of the chore of learning difficult subjects—Montaigne’s father, for instance, started him in Greek by writing the letters and the easiest words on playing cards and inventing a game to play with them.”1) (via Paul-Rand.com :: Design and the Play Instinct)