This isn't a inexpensive site, but it is pretty fun if you have kids. Plenty of hands on things to do. It also has a a pretty long aquarium tunnel with sharks and rays. Overall, I would think most little kids would love the place. Big kids will wiz through in a couple hours, but they'd probably enjoy it too. Also across the street, there are trains to look at. The CN tower is right nextdoor, along with Rogers center. So make a full day of the spot and catch some other sites while you're there.