It's nice to be easily entertained. Dogs like tennis balls, but they are also content to just chase their tails. Cats enjoy hiding in boxes and pouncing on the beam of laser pointers. And now we can add small rocks to the list of things that can keep animals — or at least this one otter — entertained for a while.

Filmed at the Twycross Zoo in Warwickshire, England, the video shows an otter enjoying time with various rocks. The otter bends and squirms to keep the rock near itself, even holding stones with its rear claws. Based on the video, the otter doesn't want to share its toy with others, but we're sure there are plenty of rocks nearby for the other otters to have fun with as well.