They had a lot of exhibits and live demonstrations Including the electricity, observatory, gravitational waves and paper making. We spend six hours there and could have spent more if it were open longer. Having only experienced the Pittsburgh and Buffalo science Museums this one is much larger with more stuff.
I do agree with many that many of the interactive exhibits could use some updating/ maintenance but overall it wasn't that bad. Every science center can use more displays exhibits especially the new technology stuff. The mammoth and mastodon exhibit was cool though.
I was disappointed that they don't share the science museum agreement with the Buffalo science museum so that admission was free/ reduced. 70$ for the family of four isn't terrible but we were expecting less. Oh well.
It's worth the time to visit if you're in Toronto.
Parking was 10$
Couldn't find the souvenir store.