Lyle Norg is the name of the first member of the Legion of Super-Heroes to go by the name Invisible Kid. An accomplished scientist, Norg invented a serum that allowed the user to become invisible at will. Using the serum himself, Norg applied for membership and was accepted into the Legion.

Invisible Kid had a distinguished career as a Legion member. He was a member of the Legion Espionage Squad, to which his powers were well-suited.

Invisible Kid was killed in battle against the Fatal Five, when Validus crushed him.