For today I have made watermelon jello. Pretty easy to do. Mac thought I should be making jello shots. HaHa ;-p Take some watermelon chunks and put in a blender. You will need 1 cup of pureed watermelon for each envelope (¼ of an ounce) unflavored gelatin.
Pour watermelon juice into saucepan and heat up. When it is at the point of boiling, pour in gelatin. Stir until gelatin has dissolved.