Midsummer Costumes

[evilpinkbear.livejournal.com]

I'm not sure how "crafty" this is but oh well, here it goes...

I'm helping design some costumes and set for my school's spring play, which happens to be Midsummer Night's Dream. The whole thing is a really extreme mortals-fantasy lay-out, and so that's how costumes and set are gonna be handled. I'm mainly a bit concerned about the faeries in the performance, because there's so much work in their costumes.
We're trying to do this on a very tight budget, so I was wondering what we could use for costume pieces that won't break the bank?
Most of the line-less characters will be easy (all they have on is body paint and flowers ^_^) but the characters like Puck, Oberon and Titania are a little more tricky, because they'll be needing full costumes, mainly drapey skirts, tights, tribalistic facepaint, sparkles, horns, the whole deal.

What materials can we use for costumes?