Thanksgiving weekend included this family’s first trip to Hershey, Pa. For three little girls HersheyPark and Chocolate World were candy-coated nirvana. Life doesn’t get sweeter than designing your own chocolate bar. Sprinkles? Butterscotch chips? Yum. For adult vacationers the story of Milton Hershey’s entrepreneurial journey was educational. His formal schooling ended in fourth grade. Two…