Nelly Toll was eight or nine when she painted, “A Trip With Father: A Present for Good Behavior," in 1943. At the time she painted it, Nelly hadn’t been outside in probably a year. She was Jewish, and she and her mother were in hiding in Lwów, Poland. Today, Dr. Toll is self-isolating like the rest of us, and speaks to MacKenzie about her childhood in hiding and her watercolor box.