Wizard of Oz musical (not movie) questions

I believe they were inflatable, and they just let the air out of them and pulled them under the house set piece.


Sort of like a party whistle.

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TheatreDiva is correct in terms of the film. There are several traditional methods for the stage:
1) The MUNY rental unit (And many others), feature an "Oz" porch, which has the feet under the porch, and, at a cue, they pull back under and a piece of fabric decorated like foundation covers the spot.
2) The most common way is to have the Munchkins swarm Dorothy, and they switch shoes on her. Typically these are the shoes on the prop legs.

Does this help?

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I saw a production that had Dorothy in the Ruby Slippers for the entire show and had some kind of fabric covering over them for the Kansas scene. the change was done by a munchkin behind Glinda's dress the second a pyrotechnic went off for the disappearing shoes.

http://www.beyondtherainbow2oz.com/stagethewizard.html