Sunrise Smoothies

Place the 1 1/2 cups watermelon in a blender. Cover and blend until smooth. Divide watermelon puree between two 12-ounce glasses; set aside. Rinse out blender. In blender, combine the 1 cup cantaloupe, the yogurt, and orange juice. Cover and blend until smooth. Slowly pour into glasses on top of watermelon puree. If desired, garnish with small wedges cantaloupe and/or watermelon.