It's in My Genes (Gimmicks and Online Instructions) by Michel

A masterpiece of stand-up magic! The magician says, "To learn magic you have to study. But I wonder if it has something to do with heredity. My son is 5 years old and he's a gifted child." The magician asks a spectator to come on stage. Assume, in this example, that his name is Tom. A plastic, yellow envelope with a big label is shown, with words printed on it: "Choose a Number from 1 to 100." The magician asks Tom to point to anyone in the audience and asks him to choose any number. It is written on a Post-it note and sticks it on Tom's right palm. The yellow envelope is opened, and a smaller plastic grey envelope is removed. It has a big printed label that says, "Choose a letter." The magician asks Tom to point to another spectator in the audience to choose any letter. After he calls it aloud, it is written on a Post-it note and stuck onto Tom's chest. The envelope is opened and a box of jumbo cards with different printed flags on the faces is removed. Another spectator selects, in