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Maybe https://en.wikipedia.org/wiki/Scratch_(programming_language), although I'm not sure if there is a phone/tablet version?

I think she is into the output. 15 years ago I would have said Macromedia Director. I don't know what the equivalent would be nowadays.

If she does have access to a tablet http://twolivesleft.com/Codea/ is worth checking out too. (though `distribution' isn't a thing)