Into the Woods is a really great play. If you haven't seen it, look it up on youtube. You may not be able to find the whole original play, but I'm sure you can find some variation of it as a lot of high schools and such do it. Its basically all about 'be careful what you wish for' kind of deal. 

As far as time periods, that kind of hard to say as all the Disney Princess movies supposedly took place at different time periods, but if I had to choose I'd say 1800s.