My creation: A pair of orange-quinine jello tits, made with double-strength gelatin, "jiggler style". The nipples are gumdrops. I bought a styrofoam bust (meant to be placed under a shirt) at a costume store to use as a mold. It worked well enough, though I had some difficulty getting them out.
The plate is sitting on top of a jiggleator, created by attaching an offset weight to a fan blade and some rubber feet to the fan to support the plate, and setting the whole on top of a pillow so that it's free to jiggle. The effect was quite wonderful, even better than I had hoped.