I once saw this at a christmas party for kids and thought it was the coolest idea!

Get a watermelon (not expensive) and cut it out like a basket. ie. so it looks like it has a handle (Little red riding hood type basket.

Then take out all the watermelon contents using a small icecream scoop or teaspoons to make little watermelon balls. Then put the watermelon balls back int he basket which is actually made from the watermelon skin! It might be a little time consuming but its creative and unique!

It looks fantastic and kids and adults love it.