SF Zoo or Oakland Zoo?

Planning on taking my kids (8,3 and 9 months) to the zoo and SF aquarium. Which zoo do you guys recommend? Thanks!

SF ZOO

Yeah, SF zoo, for sure. They got a great play structure there.

definitely SF Zoo; Oakland Zoo is not what it used to be....

Thanks for the input guys. Not trying to save money, just trying to give the kids a better experience

Oakland Zoo is located in a hilly area.  When the weather gets hot it gets tiring walking around real fast specially for kids.  Most of the animals stay inside their houses if the temperature rises and you can't see them.  They're smart.

don't forget to ride the Lil' Puffer train at SF zoo...yes it costs money, but the kids love it (hell i loved it when i was a kid)

new play structures are awesome.