Check out my new necklace! It's easy enough for a child to do, which I know because that is about where my jewelry-making skills are.
Condition the clay by working it until it is soft. Form the red clay into a wedge the size and shape of a slice of watermelon. Add a thin band of white clay across the top.
Add a thicker band of green clay above the white. Smooth everything until you are satisfied, then bake the clay according to the package instructions.
When the clay has cooled, use the Sharpie to draw seeds onto the red portion. Baked Sculpey does not need to be sealed, but I chose to add a coat of Mod Podge so that my watermelon would be glossy. Your choice.
Adhere the bail to the back of the pendant. When the glue is dry, hang the pendant on the cord or chain of your choice.