I would stock the trout. I think they are fun at feeding time which it sounds like you want for the kids. I also get a kick out of how they will jump way out of the water at other times besides at feeding time. For me that adds a bit of unexpected fun at any possible time. I assume they are chasing forage, so for that reason I would add in FHM just to give them something to chase, especially in times when there isn't ice cover. I have put anywhere from 20 to 50 in my 1 acre pond without problems, but they seem to do best around the 25 mark.