Sansa, Arya and Bran break it down in the commentary for the show's Season Two Blu-Ray set. (via HBO) .

Sophie Turner (Sansa), Maisie Williams (Arya) and Isaac Hempstead-Wright (Bran) work it out, Winterfell style:

Source: HBO  /  via: hbowatch.com

The kids sang the "Game of Thrones" theme on the Season One Blu-Ray.