A Michigan lemonade stand run by three brothers was shut down over permit fees that would have totaled nearly $400 for the summer. Instead of giving up, the kids took their case to lawmakers. They helped advance a bill that could make it easier for other young entrepreneurs to get started. What happened? A new permit requirement ended a three-summer run for the Mielke brothers at a farmers market in Rogers City. Ethan, 13, Seth, 11, and Jonatha…