tin can lanterns are easy for kids to make and give an amazing ambiance. freeze water in tin cans, use sharp nails to pound holes in randomly or in a design, and pop a candle on the inside. fun, frugal and beautiful!
Perhaps a little bit cheaper than the giant centrepieces with lots of branches. With the tree branches idea of getting them and painting them white would really pretty if we hung crystals on them and maybe added some flowers (if we get good ones)