lol, you are right! Adults should go potty too!! lol Although I would be pretty upset if I was working on mastering a skill and had to keep waiting on potty breaks! lol!
I don't know about the stew!
Keep your food, I've been playing for awhile and had an island event that wiped out all of my food!!! It wasn't a problem, but still, quite a shocker! As for the tech points, you can change clothes all the time....
I don't think the collectibles are on a cycle, but I do notice that during certain parts of the music (especially the chimes) they are more plentiful, but I've had them pop up at all times.