Conductors, Semiconductors, and Insulators
Water is one good example of a conductor.
Copper is one good example of a conductor.
Metal is another great example of a conductor.
Semiconductors are materials that do not allow electors to flow freely but don’t directly stop them either. More resistance than conductors, less resistance than Insulators.
A good example of a Semiconductor is silicone (used in computers chips).
Greatly impede or stop the flow of electrons with very high resistance. It prevents you from getting chocked.
Cinderella must have been really safe when wearing those glass slippers because glass is a insulator so she can't get shoked
If you are not lucky enough to get a fairy-God-Mother to bring you glass slipper you can still be safe with rubber slippers.
Thankfully the air is a insulator unless is really humid.