Amish country has many fine products to offer including baked goods, bulk produce, leather goods, quilts, furniture, and other hand-made crafts. Generally prices are great and the experience of buying hand-made craft items is unique. The beauty of the countryside is also worth the trip itself. Expect to not to use credit cards, so bring some cash.
A few things that the Amish community would appreciate are:
wear discreet clothing, please, no very short skirts or shorts, bare midriffs, tank tops
please no photos of Amish individuals, they would rather not, please don’t sneak photos either
take care not to kick up too much dust on gravel roads while passing others