Whenever a participant arrives to class on time from breaks, lunch, etc. give them one playing card. You
can also hand out cards to people who volunteer for activities, are helpful, answers a difficult question, etc.
At the end of the day, play one hand of poker. Give a small prize to the best hand (you can also pick the top
two or three hands if you want to give away more prizes). Note that the more cards a person has, the better
the chance of winning.