Can the snack itself be attractive?
Of course!
http://www.google.com/search?hl=en&rls=com.microsoft%3Aen-us%3AIE-SearchBox&rlz=1I7GGIE_en&q=nutrition+snacks+attractive
http://www.google.com/search?hl=en&rls=com.microsoft%3Aen-us%3AIE-SearchBox&rlz=1I7GGIE_en&q=nutrition+snacks+attractive