Cara Cara oranges, a type of navel grown in California's San Joaquin Valley, are available December through April. Their outward appearance is similar to other navels, but their interior is a distinctive pinkish red and has an exceptionally sweet flavor with a tangy cranberry-like zing. Cara Caras are a rich source of Vitamins A and C, fiber and Lycopene. A perfect snack served as wedges, they're also a colorful addition to beverages or squeezed into a vinaigrette salad dressing.
I guess it's the cranberry like zing that I didn't appreciate. Oh well at least the kids like them.