Very obvious for my now DS6 (b-day this weekend) :-) The other day we met at a book store that has one of those Thomas Train tables...a new friend of his who is 8 wanted to meet there for some play time. The 8 year old picked up some dino toys and started to "attack" the thomas trains on the table while my DS went and searched for a new Choose Your Own Adventure book from the shelf. He sat down in the chair in front of the train table and proceeded to get lost in the book....after a few minutes he looked up and told the 8 year old that he was too loud and that DS couldn't concentrate on his book. Needless to say the 8 yr old's mom just looked like my DS had horns growing out of his head for not wanting to play dino attack.