"Fire" & ice lantern - pretty awesome! Fill a balloon with water and let it freeze just enough for a thick shell of ice to form. Poor remaining water out, cut off balloon, and stick an led candle light underneath. This could be great for a party.
Also on these boards
DIY LEGO Camping Lantern on Lalymom
Fill a round balloon with water and set outside until almost frozen through. Run hot water over frozen globe until balloon pops off. Pour out unfrozen water from inside and insert a tealite. Makes a great walkway accent. These are gorgeous.