The $126 million genetic-testing company can tell you how to live smarter, better, and longer. It can also tell you what might kill you. You can purchase 14 gallons of organic milk or 396 lollipops. You can give her 33 rides on the Ferris wheel at the state fair, or you can get him a couple of violin lessons. You could put the money in a savings account, you could buy her her very own LeapFrog LeapPad Explorer digital learning tablet, or you could buy enough pizzas to feed all of her friends on the block. So many options, so...