An 8 year old was in the control tower at JFK Airport, New York on 17 Feb 2010, and was on the radio directing the air traffic giving aeroplanes clearance to take off.

Tower: JetBlue 171 Kennedy Tower, caution: wake turbulence of a heavy A340, runway 31L, position and hold.
Pilot JetBlue 171: 31L, position and hold, JetBlue 171.
Kid: JetBlue 171 cleared for take off.
Pilot JetBlue 171: cleared for take off JetBlue 171.
Tower: This is what you get guys when the kids are out of school.
Kid: JetBlue 171 contact departures.
Pilot JetBlue 171: over to departures, JetBlue 171, awesome job.
Tower: have a good day
Kid: 03 cleared for take off.
Pilot AirMex 403: 403, cleared to take off. Thank you very much you have a great day.
Tower: Attention, Kennedy ATIS changed to Juliette: altimeter 2952
Kid: AirMex 403, contact departures, Adios.
Co-Pilot AirMex 403: Contact departures, AeroMexico 403, adios.
Tower: JetBlue 195, wind 130 at 13 runway 31L, cleared to take off.
Pilot JetBlue 195: cleared for take off 31L, JetBlue 195.
Kid: Contact departures. Adios amigos.
Pilot JetBlue 195: Adios amigos, over to departures, JetBlue 195.
Tower: Comair 486, Kennedy. Following an A320 wind 310 at 16, 31R, cleared to land.
Pilot Comair 496: Cleared to land, 31R, Comair 496.
Kid: Good day, dude.
Pilot Delta 216: Delta 216, See you later dude.

I chose this video because it was not from the news. The controller and his supervisor have been suspended over this incident being cited as unprofessional.

source: jk6115, www.liveatc.net