Really..it is pretty cool. I've been looking at it since yesterday....and my first thought was....Make it a game!!
You know....put it into the center of the table....4 players. Then put 3 Red Marbles in there, along with one Black Marble. Ding a dinger, and everyone tries to grab the black one as fast as they can.
'Course then, you'd have to clean up afterwards.
Ok..maybe not.