Birds do it. A crow has been caught on camera carrying a jar lid to a snowy roof in Russia to snowboard down.
Bees do it, they stop along a path offering food and small wooden balls to push the balls back and forth. They play.
University of Massachusetts Professor Dr. David Toomey looks at this growing field of study that was once considered laughable.
But now, research is showing how many animals, just like humans, play to reduce stress, build community and defuse conflicts.
His new book is called Kingdom of Play: What Ball-Bouncing Octopuses, Belly-Flopping Monkeys, and Mud Sliding Elephants Reveal About Life Itself.
