Hi Mirielle a really great place to go with the kids during inclement weather is http://yorkdale.kidnetix.ca/
I have a son almost 4 years old also in daycare who absolutely loves going there. The staff is great and the playground fantastic. It's $8.00 per child and siblings under 1 years old with a paying older sibling are free. I usually bring my own snacks and drinks (you can use the party rooms not in use for feeding) but they do have hot dogs, popcorn, drinks there for sale and complimentary coffee for adults.
We've invited lots of friends to meet up with us there and all the kids love it!
Cheers, Suzette