Cheap wine glass + tea light candle + paper cup with bottom cut out. great idea for center piece ideas. can even take a clear cup with bottom cut out and cover in craft paper. I like it without the shade.
Jello in a vase and drop flowers in it. Use half the water that jello recipe calls for for more vibrant color. you could use lots of different colors, use lots of stuff to toss in there and use them as centerpieces for any party!