Place the watermelon chunks into the blender.
4 cups watermelon chunks
Add honey to the blender if using, then blend on high speed until the mixture is smooth and uniform, about 30 seconds.
1 tablespoon honey
Remove the blender lid and pour the watermelon mixture evenly into the popsicle molds, filling each mold close to the top.
4 cups watermelon chunks
Insert the popsicle sticks into the molds, making sure they are centered and secure.
Place the molds into the freezer and freeze for at least 4 hours, or until fully solid.
Once frozen, remove the popsicles from the molds by running warm water briefly over the outside, then serving immediately for a firm, juicy treat.