My two sons (ages 5 and 8) recently found some Trainz videos on Youtube and are interested in the game.  Before I shell out for a copy, I would greatly appreciate opinions on whether it is suitable for kids.  Would it be too difficult?  They both love Sid Meijer's Railroads -- my 5-year-old loves playing in train table mode, and my 8-year-old also enjoys the competitive modes.  Both are more interested in the building/planning part of the game than the competing part, so a straight railroad simulator would be great.  Would Trainz be suitable?  If not, is there another program they could try?
 
Cheers,
Elizabeth
				
			Cheers,
Elizabeth