Panzer, thanks for the list. That gives me more to look at. He also went through a Roller Coaster Tycoon phase.

I'm going to look at this Kerbal Space thing and space engineers once DS exhausts the other two games I just bought. I loaded Age of Empires for him today. Age of Empires I looks like some old Atari game but he is strangely fascinated by it. Age of Empires II looks more along the lines of Settlers with better graphics than Age of Empires I, and it makes more sense.