On the TED site it says this about the talk by Stuart Brown;
A pioneer in research on play, Dr. Stuart Brown says humor, games, roughhousing, flirtation and fantasy are more than just fun. Plenty of play in childhood makes for happy, smart adults — and keeping it up can make us smarter at any age.
There are some wonderful scenes involving a polar bear and and a tethered husky. I’m sure you’ll be moved.
Enjoy your weekend. I certainly intend to! Last one before a return to work on Monday.