It’s not an invention—more like a gadget.
As ineffective as our TSA are, yes, he probably could have boarded an airplane with the device without anyone ever examining it. However, he wasn’t trying to board an airplane—he took it to school to show his teacher and friends.
Like I said in an earlier post: the attitude of these public skrool staffers and the folks on this board is why the next Edison won’t be an American.
A lot more information is needed to determine if the story is legitimate, or a staged "Muslim gets picked on because he is Muslim" style event.