I did it last year, alot of it is looking after kids that go there for holiday care. Some things i found really good like feeding giraffes and handling the reptiles in the education rooms, but i was doing it by myself and alot of the people were there with friends and werent extremely social. But doing the over night stays are really good and if they like you enough they have different oportunites where you can help with breeding programs.
I didnt do it again this year only because alot of it was just showing kids around and handing out pamphlets.
That sounded really negative. But it was a good experince but i would rather do volunteer work where i get to work with animals more frequently