Things have to be revealed to children that age. You don't point it out chances are it'll go over their heads. Now if they were 8-13, that's a different story.
Lol I let my 8 year old cousin play DOA. One time she shook the controller in excitement because she was hyper and she won and then... ya know what happened next.
Wow.... your cousins must have some pretty big hands to grip a controller at 6 and 4 years old.... no offense. As for the other thing I think you're an awesome older cousin for letting them play the best game ever.
@Mayor-Of-Mustard That's how my cousins found out XD Ever since, they don't even really play...they just shake it for fun. @Lulu Thank you, I feel better about myself now^-^ And no offense taken, they do indeed have some pretty big hands
@Mayor-Of-Mustard LOL! My cousins are the same way, but the oldest likes Ryu and Jahn lee. Strangely, despite knowing that guys don't have that "special gift", he shakes the controller anyway, and he'll get upset when he seesaid that the shaking doesn't work for the men