01 - Cut a thin slice off the bottom of the watermelon to create a stable base for the serving vessel.
02 - Mark and carve a Jack O Lantern face on the opposite side using a small paring knife or pumpkin carving tools. Remove the cut-out pieces to create openings.
03 - Slice off the top quarter of the watermelon and set aside temporarily.
04 - Scoop out the watermelon flesh with a melon baller or spoon, reserving as much as possible for the salad. Place the carved watermelon shell in the refrigerator to chill.
05 - Remove any seeds from the watermelon flesh and cut it into bite-sized pieces or balls.
06 - In a large mixing bowl, combine the prepared watermelon, cantaloupe, honeydew, pineapple, strawberries, blueberries, and grapes.
07 - Drizzle with lime juice and honey or agave syrup if using, then gently toss to combine all ingredients evenly.
08 - Fill the chilled watermelon Jack O Lantern shell with the fruit salad mixture and serve immediately for optimal freshness.