If you have a brood of red-blooded American youngsters, your summer is probably defined by daily visits to the local ice-cream vendor. Luckily, now you can banish that motherly guilt about loading your babes up with artificial flavors, colors and preservatives, thanks to the recently opened Red Mango frozen yogurt shops in Evanston and Naperville. Choose between original and green tea flavs and mix with a wide array of yummy (and healthy!) toppings that range from blackberries to graham crackers. Alternately, opt for a drinkable blender to quench your thirst on a hot Monday afternoon. You’ll probably spend about $4 per person, but you’ll save a ton of time not having to burn off another 1,000-calorie frozen concoction similar to what you’ve been consuming all summer.