"A lot of things," she replied, watching as the doe stepped back as he tried to touch it. It was always interesting seeing how the patronus animals seemed to have a life of their own. They sometimes make their own decisions on what to do for the brief time they take form. Lily shrugged and then with a flick of her wand the doe disappeared.
"What do you want to see?" She was sure there was something that he would feel would prove it to him that she could either do or be able to show him something similar. Unless it was an idea that they didn't have a spell for of course.