What parents have backyards anymore?? Who? Even in the wealthy neighborhoods in my area, they are filled with expensive condos and overpriced duplexes. Nobody has a yard. Kids go to a park to play, or more commonly, they play in parking lots.
Now that I think about it, it's really sad that the only ground that children know in their backyards, the ground they have to play on at home, is just asphalt.