On our way into Giant we were asked if we want to support the fight against child cancer. We said yes, of course, and plopped down $5.00.
(For those not in the know, supporting a cause like fighting cancer is essentially a good deed - known in hebrew as a mitzvah. Well, a mitzvah is technically something more specific than that. But for our purposes, this definition is fine.)
Now for the perfect part. They are actually scratch off cards! We ended up winning a few coupons - but just the thrill of knowing we might have won something was worth it. Gambling meets charity.
How can you go wrong?