No how about forgetful parents! How in the hell can you forget a kid. I mean its not that hard.
Lets blame the airlines shall we.
What's the bet they showed up late and were given the last available seats. And then loitered in the duty free before making a mad dash to get on the plane, probably being the last to board.
I would suggest a meeting with the local child welfare may be in order.
PS Where does it mention a low cost airline flew them from Israel?