A co-worker of mine occasionally plays Bingo without physical prizes. Instead, she gives away imaginary prizes such as: Trips around the world, a million dillars, a yacht, a sportscar, a personal jet, a tropical island, etc. The residents really love to play for these prizes, and even find themselves trading prizes with one another after the Bingo game is over. Sometimes, the imaginary prize is large sums of money which the residents have to give to their favorite charity. Again, the residents love to hear what each other's favorite charity is.