Just bought my 3 year old buddy a Hotwheels set with double loops he loves the set. We are running car after car down the track and picking the cars that make the loops. He calls out UNIMOG!! and off it goes....One of the few cars to make it through our set up! OK he knows the Unimog by sight and loves to say Unimog and I'll be danged the thing is a gravity racer too!