The dragons are the classic "snake-like body with wings and legs" type, not the "dinosaur with wings" you see in some figures, with sizes of adults ranging from 10ft or so up to 60-70ft long, and presumably thicker bodies (but not hugely so) with greater length. I'd particularly like some holding things, e.g. books, lying on piles of gold, driving steam engines, etc.
Any suggestions on this would be appreciated.
Oh, and they wear hats, though I suspect that people will have to make their own.