I can name things which use electricity eg lamp, and those which do not eg stapler.
I can tell someone that electrical sockets are dangerous eg the electricity is so powerful it could kill you and that plugs should not be touched with wet hands.
I can make a working circuit using bulbs and/or buzzers and make drawings of these.
I can spot which circuit will not work and say why.
I can draw a simple circuit diagram and show it works.