Something's you do as a child stay with you.  Always bringing sandwiches on daytrips is one of them!  Of course back then, there weren't the vast array of concession stands and eateries there are now, and I'm in America - land of abundant food!!

Even so, I try and bring snacks, or even a sandwich dinner (assuming they had a hearty lunch) to the pool instead of buying junk from the snack bar!!

Don't get me wrong - we are on the wrong side of the takeout v healthy eating lifestyle, but I celebrate small victories!!