A lot of characters in kids' books have it pretty good, from calling the start of the wild rumpus to ordering room service from their hotel suite. If you could be any character from children's literature, who would you be?
Charles Wallace Murray. Doesn't everyone want to have special powers, and play a significant role in making the world a better place?
Of course, Lafcadio (the lion who shot back) is also a strong choice. Unlike Lafcadio, however, I don't really care for marshmallows. I don't hate them, I just don't ever plan on taking a bath in them.
NOTE: I answered this quick, and reserve the right to change my answer a few million times. Today it's Charles Wallace, with Lafcadio in a close second.