I think it would depend on how you want them portrayed. Before Disney did a cartoon, there's actually a real life version with the characters played out rather well with famous characters of the time. The book obviously had illustrations, that other movie just came out not long ago, and there's the American McGee style. Even a silent film (I think) from 1902 or 1903. If you don't want it to look so cartoony, there's plenty of variations to choose from, or even mix and match as you see fit to actually keep it as worthy of the book as you want,, or go as blended as you want.