We honestly didn't do a ton of excursions, in Juneau we took a shuttle to Mendanhall, then it was about a 2 mile r/t hike to the waterfall and to see the glacier closer. There were also some other little trails around there we hiked, got to see a porcupine, and apparently had just missed seeing a mama bear and 2 cubs. In Skagway we did the train which I think at least 90% of our ship did. In Ketchikan we just walked/hiked around as well, I wish we would have had more time there but is was back onboard by 12:30 so we felt rushed.
We did not see a lot of kids at all, some, but not many, mostly toddlers. However I think that was due it to being the last week of May and most schools were still in session. We did see a family who home schooled though.