There's 'Spooky Buddies' which is full of friendly ghosts and fun adventures. It's not too scary for toddlers and has lots of laughs. Also, 'The Casper the Friendly Ghost Show' is a classic that's gentle and amusing for little ones.
Typically, a funny old man cartoon face has features like a bulbous nose, a few missing teeth shown in a wide smile, and perhaps wild hair to add to the comical effect. The colors used might be bright and bold to make it stand out.
Well, it's hard to say for sure. But historical fiction comics about medieval man that focus on real events and characters can attract a lot of readers. They offer a glimpse into the past and make history come alive.
In the caricature, the relationship could be one of authority and respect, with the teacher instructing and the student listening attentively. Or it could be a more relaxed and collaborative connection, with both sharing ideas and having a good time.