How old do you have to be to work there

To work work there you need to be 18y to apply. If you just want to volunteer - 15y and under you'll need a parent/guardian w you and 12y and under cant do animal handling.

To volunteer you need to be accompanied by an adult

At 16 I was able to go alone. And 10 years accompanied by an adult.

I think they do summer jobs for teens but you can call them.