We've asked about kids on the bus tours in Denali and it seems like a mixed bag depending upon a number of factors. Our 4 hour trip to Eielson was boring and we saw more buses than animals. Animal sightings picked up on the return trip but most were far and not easy to spot so that might be a factor. Sightings depend upon fellow travelers to yell "stop" and then we scramble to find the animal and determine that it's not moving (as in white rock). This may be more difficult for children.
So it's certainly the luck of the draw especially for children.
One grandmother was deep into flowers and both grandchildren went with her each time the bus stopped. So my suggestion is to have alternatives. At Teklanika take their picture while they hold antlers up on their head. Very young children will need help.
Hope this helps others plan.
