White tiger.
Mini hippo.
Warthogs.
The polar bear is an excellent swimmer.
The Gnu is not UNIX.
Big lily pads.
Mmm, bananas.
Right on the handrail.
A butterfly, on a TV showing a video about butterflies.
People could pay to ride an elephant.
"The Rainforest Fights Back", a half hour show which runs twice a day. The acting and plot were not much to speak of, but the animals were cool.
They got an audience member down to join in.