The Patchwork Girl is originally made without brains (to be a servant), but our gender-ambiguous hero gives her some. This makes her so happy that she flips.
Instead, the group go off to visit Oz and find the ingredients to a potion that will un...um, stone them. Cue Writing Cliche! Oh yeah, the horse comes along too.
For any Era, the effect they use is actually pretty damn good. For 1914, it's amazing!