People of all ages can always enjoy the zoo, it is just natural for us humans to be amazed with nature. In Fresno we just happen to have a great local zoo. The price of admission is not gonna break your wallet... not even for multiple people. Paying for things inside the zoo costs a bit more though.
Not only do they have the typical zoo type attractions, the Chaffee Zoo has a great bird show and a huge amount of birds. The reptile area is also full of different snakes and things - I once saw a two headed snake, and it was pretty crazy.
Anyways, the zoo is definitely a great place to visit, especially with kids.