Piper Williams didn’t like underwear. She found her brother’s boxer shorts preferrable, but the fit wasn’t quite right. That’s when the four-and-a-half-year-old had an idea: boxer shorts for girls. With the help of her brother, mom, and dad, Piper’s idea bloomed into My Pipers, a business that keeps the whole family busy. Get inside the minds of two kid entrepreneurs as they weigh in on everything from middle school to Simone Biles.