There decision to make the trip was sudden. I don't think they made many plans. I was in Montreal so many years ago and for such a short stay, I couldn't make recommendations. I did, however, give them a list of must-sees for Niagara.
They are NOT the zipline types - definitely not something they would do. And, they are traveling with a month-old infant. So, activities have to be on the mild side or one of the adults has to remain behind while the other adult takes the older children, which is what I think they plan to do for Maid of the Mist in Niagara.
They are just so thrilled to go ANYWHERE after being confined for so long!