ya know...I would LIKE to think these people got little kids...and the guy OBVIOUSLY has more money than he really knows what to do with...and he built that for his kids....
when I was a kid I had a freind whos dad was SERIOUSLY into trains....3/4 of their basement was a model railroad set up done up SERIOUSLY right...very realistic...anyway....when they were LITTLE (about 5 or 6 years old) his dad built them a small rail system in their back like that.....they had a HUGE place....the system was about a total of 100 yards long.....the big difference was their "train" was pedel powered! lol