Noun
magic box (plural magic boxes)
(informal, idiomatic) Television.
I held out my dad's magic box and let it o, sure it would smash to the floor. Instead, the box disappeared. "Cool,” I said. "Sure you I can get it back?” "No,” Bast said. "Now come on! Rick Riordan
The Internet has always been, and always will be, a magic box. Marc Andreessen
When we started in television, there was that magic box in the corner of the room, and 'Oh my gosh - look what it's doing!' Betty White
But obviously as television began, it so undercut movies that he was trying to think of a way to combine seeing these special things, and the fact that people were just captivated by the magic box. Bob Balaban