Spitballs, Dirty Diapers, & Booger Stains Do you find that you don't really care how long it takes a train to travel from New York City to Chicago? Now, if the question was how long it takes spit from a sneeze to travel from one city to the other, wouldn't that be a bit more exciting? Dr. Mortimer Gross thinks so. He has created a special learning program that will exercise those brain cells, but instead of using buttons, apples, or pennies as examples, students get to count, look for, and spell boogers, farts, and freckles. Here are his best games, puzzles, and problems. They're as challenging as any problem with trains, but way more fun!