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!
We've seen fruit arrangements, flower and fruit arrangements, and fruit filled vases. Have you ever seen a flower arrangement IN fruit? I've seen this done with pumpkins but never a watermelon! I love it. What a great idea for your.