Mold Young Minds In your bilious-green zombie-brain mold. The plastic mold measures 9″ x 7-3/8″ x 3″ deep and comes with (2) recipes on the box: (1) for your natural, nauseating-gray-but-yummy brain gelatin mold, and (1) for a festive bright green version infested with worms. (Gummy worms not included.) Don’t like gelatin desserts? Switch to plaster of Paris and make a smart-looking paperweight.