Leon smiled a little, nothing so unrestrained as the bright grin, but even he had to admit it was a little bit fun to see a young person so excited about something. "Well, that's what an internship is for," he reasoned, arching an eyebrow slightly. He was maybe making fun of Remus a little, but it was good-natured and he mostly thought the boy's enthusiasm a little charming. "Research can be quite interesting if you've the head for books. Of course, to join after Hogwarts you'll need your NEWTs in Charms and Transfiguration. Arithmancy, Runes, and Potions are good ideas too."