If you like to drink and visit wineries, Niagara on the Lake is a short drive away. ANd you can sample the wines, including ice wines.

The drive from Niagara Falls from NOTL is quite nice and there are stuff along the way if you wish to stop. Near the Falls, aside from the falls itself, there are casinos and a very "Vegas like" strip. Mostly cater to younger kids.

Toronto ..depends what you like to do. You can visit the different ethnic neighbourhoods, try the different foods. Catch a baseball game, go outside and walk around the CN Tower http://www.edgewalkcntower.ca/ Make sure you have diapers on