I have no idea what the professional background is of the people who have posted here. As a 'lifetime' ATCO I find this whole episode sadly un-professional and embarrassing - simple as that.
ATC is not something trivial. It's core Flight Safety, along with what happens in the cockpit, and with engineering. It's NOT something to let kids use, especially at an International airport - period. I'm surprised, and disappointed, that flight crew didn't submit a complaint, TBH.
Sorry to sound grumpy, but this is not some minor airstrip and it's not a playground. If that ATCO had been on my staff, I'd have nailed his nuts to the desk before the interview.