Interesting fact:

Did you know Dr. Seuss’ Green Eggs and Ham was written when a friend bet him he could not write a book using just 50 different words? He succeeded, and it became one of the most successful children’s books of all time. The different words were: a, am, and, anywhere, are, be, boat, box, car, could, dark, do, eat, eggs, fox, goat, good, green, ham, here, house, I, if, in, let, like, may, me, mouse, not, on, or, rain, Sam, say, see, so, thank, that, the, them, there, they, train, tree, try, will, with, would and you!