Another tip: Have the 'fun' parent do it! Being the chief mess hall officer and cook can set you up for rebellion. Period. I had brought home some oranges and lettuce as requested. Naturally, the youngest had to complain and so daddy innocently walked over with his sandwich and it was in demand.
Therefore, if you want the kiddos (or yourself) to try something, have someone, or the 'coolest' parent make it and place some new items in there. The youngsters usually do not appreciate a raw stronger red onion flavor but maybe it was the salt of the pickles that made this so appealing and tasty. I may utilize spinach next time since they went for this combo.