99.99% Pure Gallium Metal
Pure Gallium is an interesting metal because it melts at body temperature, looking a lot like mercury when it's a liquid, but safe to touch. You can use some cool ice trays to create some shapes and watch them melt in your hand.This comes in a small plastic vial with an attached cap. If it's cold enough, the pure gallium inside will be solid, making it virtually impossible to remove. Just run hot water over the vial and it will melt and you can then just pour it out. Take care though, because this can separate into tiny drops that can easily get away, and, being a metal, it won't exactly soak into a paper towel or sponge. The easiest way to return it to the vial is to scoop it up with a piece of paper or plastic sheet. If it's on a smooth surface, you can use ice to harden it and make it easier to pick up.Warning. This is a soft metal, and will melt easily, and as such,it will readily mark surfaces if it rubbed across. If you're handling it with your hands, your hands will get dirty. I