They are a mixture of iron powder, water, salt, activated charcoal and vermiculite. These ingredients undergo an exothermic oxidation process, (that is they rust and get hot......)
smartestpersononplanet
Ir rubs and it makes static electricity so it makes your hands worm.
It's a game when you throw something and pretend it's hot,then when the music stops,whoever has it in there hands loses.
"http://wiki.answers.com/Q/How_does_mutation_work_hand_in_hand_with_evolution"
Yes...it removes 99.9% of germs.A good product for families.
The veins are closer to the skin.