Taiwan - Taipei Zoo, Junior at Play

Very interesting to watch one of these youngsters when they're off on their own at play.  What captures their interest?  How long is the attention span?  Do the parents seem alarmed when they're dangling upside down ten feet above the ground?  Are they having fun?  What is going on behind those eyes?  I'd love to bring a chair one day, park myself in a good spot, and just watch (and take pictures of course) for several hours instead of just in passing...