Lego was a off really as he freely admits that the company is still going strong and it's far from ever being British.

I can't imagine making a house out of Stickle Bricks (originally from Denys Fisher).

Tonka would have made sense but Tonka would have lacked the building element.

Trumps and Fighting Fantasy Books could do with a bit of a rival and bedroom computer game programming but I doubt if James would get that.

It's hard to imagine that a whole generation grew up playing successful computer games that were written by slightly older kids in their bedroom.

That would be educational and almost anyone with a bit of training could do it.