We got one of 'those.' A teenager. And he's grown and is still growing a lot this year. I had to buy him his FOURTH pair of shoes since August the other day - FOURTH! He is 5'10" and wears a size 11 shoe. He outgrew his twin bed so we had to go to a full. Don't get me wrong, if he's gonna grow then grow nice and tall son! But, it's the sleeping thing . . .I know he needs a lot of sleep . . .