Gallium

This is a metal from the periodic table, its like Mercury, but its not harmful, we all have a little bit of gallium in us also, - which is pretty cool. This metal melts at body temperature, so i was able to hold it (in this picture it is fully melted) its found in cars, and can't be air mailed or taken on any airplanes as it totally destroys aluminium. - Hope to get some education into you