The city Zoo is fantastic with some preserved vegetation and the botanic garden is near from the Zoo
If you search a good and interesting place to take a walk with your children, take them to the Zoo.
The São Paulo Zoo is pretty nice, has hundreds of different species and it's a great place to go with kids. The downside is that there are no subway stations around - you have to go by car or take the bus at Jabaquara station.
The Sao Paulo Zoo is very fun. The entire zoo is a very atmospheric space. You can enjoy a lot of animal species here. The things in the zoo are also quite attractive. You can see a lot of animals.
The Sao Paulo Zoo is really very, very big, and there is also a lot of people, and there are many animals in it. And there are many animals that have not been seen before, and I have seen different zebras and different tigers.