As just recently arrived to Canada, my first sighting of Canada Geese was exciting and I have taken at least 100 photos (slightly exaggerating). Over the course of the last two years, I realized that they are everywhere and the number of photos I have taken, each time I saw them, got fewer and fewer.
At one place, I had to observe how the parents of four small kids, motivated their children to chase the geese over the grass. I don’t know how these geese can react, but if you do that with swans in Switzerland you may have a little surprise in that they can get very aggressive. We also had a couple of white geese at home to chase away foxes and other small predators who may intended to catch our chickens. Anyway, I thought that it may not be such a good idea to let your three year old too close to them.