http://www.thinkgeek.com/geektoys/cubegoodies/8c94/
From the folks that brought you the Sweat Shirt from STF University
Come on you know you want to hold them:
A few tips & tricks for your Singing Monkey Balls...
The Spinner - Start off by clasping the Monkey Balls between your thumb and two fingers. Squeezing gently will spin the Monkey Balls briefly in the air, producing a mysterious whistle. Try spinning them from one hand into the other. The higher into the air you spin them, the longer they whistle. (Please be sure no real Monkeys are in the vicinity when trying this trick, they may become disturbed.)
The Pendulum - Hold one Monkey ball between your fingers and thumb, then attach the second ball to the bottom of the first. Gently swing the balls back and forth like a pendulum. For an even greater challenge, see how close you can bring the second Monkey Ball to perpendicular before they clash together.
The Pinch - Place the Monkey Balls on a smooth surface, pinch the ends together with your thumb and forefinger, then release. The balls will emit a pleasant fluttering sound as they spin around the surface. Experiment with different surfaces to produce varying noises.
