Gather some fellow fans, get the game, dress up as your favourite character – Sheldon, Leonard, Penny, Howard or Raj – and have some competitive fun.
BAZINGA!!!!
See the game and full range of collectables from Coolthings.
Big Bang Costumes
You can probably find normal clothes to dress up, but for the host or someone who wants to make a big impression, try a Sheldon at Costumebox (you'll need to use their site search)