One day Mr. Tinker made a ladder so tall that he could rest it against the moon while he picked stars for the king's crown. He liked the moon so much that he pulled up the ladder after himself and stayed there. (Ozma of Oz)
Tinker never appeared in any of the "Famous Forty" Oz books, but his story is told by Tik-Tok in Ozma of Oz.
Tinker is a Munchkin in Dorothy and the Wizard of Oz.