The zoo is definately at the top of our list of things to do! We even love it in the winter and in the rain. The zoo is almost empty during the winter. When the weather is too cold or rainy, there's plenty of indoor things to do at the zoo. We really like the new(ish) coffee shop at the entrance.
Now, we'll get you going to Paramount Canada's Wonderland! We have season's passes and I've been 16 times with plans for at least 5 more trip! Starting Aug 17th they have a nightly light show called ERUPTION! They blow up the mountain like a volcano each night. It's not Illuminations, but it's close. It's almost Disney-like the way they light the water at night.
Have a great summer!