LETS ALL GO TO THE ZOO! I love zoos in general, but Toronto Zoo has to be one of my favorites. With a HUGE area and tons to do, you could spend a whole day here!
Recently, they have gotten quite a few baby animals, so it would be great to head over and see them. Just beware that there could be a wait with a couple exhibits.
There are tons of food and snack areas (with AC), so if you every need a break, these are good areas to do so. With a splash area as well, the kids can come and have tons of fun here in between seeing the animals.
The Toronto Zoo is quite large though, so I highly recommend wearing appropriate footwear and water bottles. You can always refill super cold water from any of the pop machines!