I'd like to second everything the good Baron's told you about the rules, with one proviso... get the dedicated set of playing cards and the plastic markers. You don't need 'em to play the game, but trust me, these little bits and bobs will enhance your games enormously!
I've conned the kids into getting me the full bag of mashings for Crimbo. They'll all becoming over on Boxing Day, all big Star Wars fans, and I'll surprise them by taking them to
'a galaxy, far, far away' before we go to the boozer!