This is perhaps one of the most innocuously sticky sites I've seen in a long time: FreeRice.com
PLUS... it seems you help people by using it. I've already donated 540 grains of rice through the UN! Not sure how that works, but I'm sure if I hadn't gotten stuck playing the game I'd know the answer.
Hard to believe the head of cabedge (Chris) forwarded this insidious time-waster.
Heh... ahhh heck... it's for a good cause.
Go ahead... Play a while.