Cut a small portion off of the top of the watermelon, cutting as evenly as you can (about 3 inches down from the top)
Scoop out the watermelon, cut it into cubes, and put them into a large bowl
Cut up your other fruit and toss it with the watermelon cubes
Using the top of the watermelon, cut about a 2-inch slice ring off of the bottom of the watermelon top
Cut about 1/3 of that watermelon ring off so it resembles a U
Use a knife to cut any of the watermelon away from the U shaped green rind
Now you have a handle
Using a sharp knife, puncture holes on either end of your watermelon handle
Line the handle up with the top of the watermelon, in the place you think it looks best, and puncture holes where the ones on the handle line up
Cut your lollipop stick in half, so it's about 3 inches long, and insert it through the holes you've made - attaching the handle
Fill the watermelon with the cut-up fruit and other fresh fruit
Insert your shovel for serving