They're your normal average sticks dunked in uranium or any other highly radioactive matter. That is the glowing sorted.

The sound is simply the people using it. Voosh. Pzzrt!

Sticks are solid, so that explains the ability to be solid.

And the whole "being able to chop anything" thing...well. In that particular galaxy, everything is really shoddy. So their "concrete" is nothing more than a a substance that is really soft, like butter, called Butterinium. And those "metal" droids, yeah right, they're made from Greasatium.