* Grapefruit, apples and pears will float in Jell-O; prunes and maraschino cherries won't. * When hooked up to EEG machine, Jell-O demonstrates movement virtually identical to the brain waves of a healthy man or woman. * Per capita consumption is highest in Salt Lake City. * If all of the packages fo Jell-O gelatin dessert produced in one year were placed end-to-end, they would stretch three-fifths of the way around the earth.