Mark Ward:

Christy Wyatt, head of Good Technology and mum to another Minecraft fan, says parents might well be surprised at what their children have built in the game. “My initial reaction was that it was just another video game,” she says. “Now I think of it as digital Lego and he is using it to build all these amazing things.”

"Digital Lego" is a good way to put it. I could not be any less surprised by the success of Minecraft. This is basically the video game I wished would have existed when I was a kid. Instead, I was stuck playing SimCopter to walk through the worlds I built in SimCity 2000.

And yes, I would actually get out of the helicopter and walk…