In both the case of the Animal Reward Card and the Tree Reward Card (please note that these are separate, so all purchases are tracked separately), you'll need to purchase 10 animals or 10 trees at their regular Farm Cash prices, and will receive a single stamp (or punch) on your card until you've earned 10 in all. Once you've hit that point, you'll receive a free animal or tree (depending on which card type you actually completed), with a value of up to 26 Farm Cash. The way this is displayed in the game, it's unclear whether we'll get to choose our free prize, or if it will be generated for us, but we've reached out to Zynga for clarification on the matter. Stay tuned for more!
Will you purchase more trees or animals in FarmVille than before, simply to fill these new Reward Cards? Sound off in the comments!