This is only in the thought process right now... Get plastic Easter Egg, add ballistic gellatin, insert probe... any thoughts? Recipe for Ballistic Gel: 1 pd of gellatin (Knox) 1 gal of cold water Mix thouroughly trying not to introduce to much air. Put in fridge for 2 hours. (Bloom) heat to 130 Degrees F, stirring slow again try not to introduce air.(melting) Pour in mold, let it firm up. Now I know that that is way to big of a batch, but when you mix the water and the Knox gellatin it should be the consistency of thick grits or tapioca.