Ghengis,
You don't say what ages you are trying to entertain?
Don't know if it'd work - but you could try getting area's "Roped Off" to try and contain the little dears to safe areas and/or Fire Lanes/walkways.
Might seem a little crazy but it might work? all areas may have to be cleaned. You will need a suitable amount of 'escorts'.
Inside the aircraft, the floors would have to be at least "secure" and taped - if not fully fitted. (I did that in Germany once for a college/uni visit!)
????
Rigga