A solid, when affected by an electric current that will turn into a liquid and then when the liquid is sparked to turns back into the original shape and position.
how about nuclear radiation, so from the nuclear elements like PLUT there is a small area around them emitting invisible particals (in a neutron manner) that pass through nearly all elements. in explosions there should be more of this and would be more powerfull, called NCLR or NCRD?
My suggestion is paper and pencil. Paper would be almost the same color as diamond, about 00000F. Pencil could be used to draw on paper. Stickmen can hold pencils and paper.