1) Not all eateries can accommodate "picky" eaters.
2) Restaurants post their menus, and should not have to cater to those who do not like the menu items.
. . . not the eatery's problem if the patron is a picky eater
. . . not the eatery's problem to supply an endless list of menu alternatives
3) Either the people/kids learn to eat what is presented or you should choose another place to eat.
NOTE: Yes, this sounds overly crass, but eateries should not have to offer an infinite amount of menu items to please everyone's taste or desires. If the offering are not liked, one should find another eatery.