This is the Oliver H. Kelley Farm in Elk River, Minnesota. It is a living history museum operated by the Minnesota National Historical Society. It was designated a National Historic Landmark in 1964. The sender of this card works with kids at a high school, and she said she had taken they had taken a recent field trip to this farm. She told me they baked crackers, harvested turnips, and saw sheep in labor. That sounds like very fun field trip to me!
This card arrived on July 16.