I just asked my (then-10 year-old) daughter what her favorite part of our trip to Toronto was last July and she responded - without hesitation, "the science center". I then asked her if she had a favorite exhibit, and she said "all of them".
I think the same could be said for the rest of our family, as well. It was truly the highlight of our trip. From the Rainforest, to the exhibit on the human body, to the Science Arcade, and finally - our families' personal favorite and where we spent most of our time - the Innovation Center. I could have spent the entire day in that one exhibit! Our kids made their very own shoe out of different materials, were able to create their own stop-motion movie, experimented with sound...the fun never ended!
There is a great cafe to eat at with many healthy (and not-so-healthy) options available. If visiting in the summer get there before the typical lunch rush so you can get a seat. Otherwise, the large summer camp groups will take over and you'll be waiting quite awhile to find a spot to sit.
Yes, there are a lot of kids, so if you don't like kids, don't come here! Not quite sure why anyone would come here with the expectation that there wouldn't be any kids. It's a great place for them to come and learn and get some hand-on experience with some amazing science - something all kids nowadays could use.
Parking is easy and costs $10, payable upon entry.
Our tickets to the OSC were part of our City Pass (which I HIGHLY recommend getting!). Not sure what general, regular admission is.
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