Hamilton Kids-Fest -- Canada's largest indoor inflatable festival returns on Family Day Weekend! February 18, 19, 20, 2017. Blown up and ready for play will be some of North America's largest indoor inflatable rides. Kids will jump, bounce, slide, crawl and laugh their way through the day. All this, in addition to shows, interactive activities, games, crafts, character meet-and-greets, full access to the Canadian Warplane Heritage Museum and more!