A colleague in Mom's school district came across this link: FreeRice.com.
The "game" is a vocabulary quiz much like the "Word Power" feature in Reader's Digest.
The payoff is ... For each word you get right, the sponsors will donate rice through the United Nations. You have to play a whole lot of rounds to donate significant amounts of rice as your "winnings" are paid in single grains.
Mom had a few minutes to kill and managed to donate 710 grains before she had to go home for the day.
Obviously, the better your vocabulary, the more rounds you'll "win" and the more rice you'll donate.
Mom, being an English teacher and a high-scorer on the verbal section of the S.A.T. many moons ago, will continue to use her skills for GOOD. Might you do the same?
Where can you find this game? FreeRice.com