If you are not that experienced and question the abilities of your group, perhaps one of the summits with tram or car access would be a good idea. Cannon Mt. would be a great choice because of the tram and it would be good for the youngsters to try to spy out other flags from other summits. (i only saw flags on Garfield and Flume last year). There is a viewing glass on the summit tower so I’d advise bringing some quarters to look through it. Hopefully if the weather cooperates you can see some flags across the Franconia range and maybe the Kinsmans as well. Kudos for bringing your child to the event. It can be something they remember for a long time.