Children playing a variation on tag. Photo CC BY 2.0 EJ Fox.
You don't need a referee, you don't need a whistle, and you don't need a ball. It's dangerous, it's exciting, and often it's been banned - it's Bullrush.
David Slack talks to Wallace Chapman about the book he has written about this game, which has been popular with generations of New Zealand children, and banned by various schools and parents.