Here's the Game of Thrones opening sequence with the theme song being performed by the actors that play the Stark kids--Maisie Williams (Arya), Sophie Turner (Sansa), and Isaac Hempstead Wright (Bran). This is one of those fun little gems found on the DVD/Blu-ray commentary that put a smile on my face.
Source: Via: Blastr (http://blastr.com/2012/03/the-stark-kids-from-game.php)