Homemade Heat Pack Gets WetMy son is 11, has Autism and is non-verbal. His para at school has a bean/rice flannel bag that she heats up. He's in love with it! So she mentioned it to me, and that her daughter made it for her years ago at girl scouts. Well I went out and bought dried beans, nice rice, Red Sox flannel fabric and hand stitched it! When I heated it, it got hot but very stinky! Then it began to retain moisture and the flannel began to sweat/feel wet!