The National Zoo gave a group of Asian small-clawed river otters an electric keyboard. Some enjoyed this more than others. They call it an animal enrichment program. The zookeepers do things to give the animals some physically and mentally stimulating activities and environments for the animals. Not sure all such programs are this cute, but this sure is.
Check out the 'dancing' otters at the Chester zoo in in England. I don't know why they are happy, but the sure make me smile. The squeaking is tooo cute!