From 30th October until 10th November 2012 you will be able to get yourself a free copy of Plants vs Zombies. PopCap(the makers of Plants Vs Zombies) have teamed up with American Dental Association for this special offer.
Simply print out/save the offer code sheet(click here) with the offer code on it. Then, on 30th October go to StopZombieMouth.com and redeem the code. Since the code is valid for an unlimited amount of usage, you will be able to print out the offer code sheet and give it to as many people as you like.