Adrian Voce is a prominent advocate of a child's right to play and had lots of previous involvement trying to make good policy for play. His words here are particularly concise and hard hitting. I like his analysis:

'A society that proscribes hopscotch (BBC News, 2013), ball games and young people simply hanging out together in public, while accepting a daily toll of death and injury to children simply trying to get from one side of a street to another, really should examine its priorities.'