An icy treat for hot weather! Kids will love this and parents will to. Things don't taste as sweet when cold so people who like sweeter lemonade will want extra sweetener while those who prefer a tarter drink will not. Adults may enjoy the optional rum or whiskey. Any excess may be frozen in popsicle molds. Variation: Try frozen juice concentrates instead of the lemonade concentrate. I like grapefruit, my kids like grape. Try orange slushies for a summer brunch.