IT'S most passengers' worst nightmare: having to deal with crying babies and noisy toddlers during a long flight. Well, imagine being the parent, trying desperately to quieten them down while copping furious stares from fellow passengers.

Now a US company wants to ease the pain of flying with children by creating an airline for families only. But is it a plane bad idea?

The design firm RKS has unveiled a concept plan for the child-friendly cAir airline, where overwhelmed parents and bored, fussy children could soon be able to unite.

The airline would feature an on board rent-a-toy rental service, play zones separated by partitions and seating allowing families to face each other.

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It would even offer soundproof "compartments" – essentially a curtain that you pull down around you - for when passengers want to escape the chaos or, for example, when a mother wants to breastfeed her baby in privacy.

There would be child-friendly lavatories, with larger changing tables and a child waiting area.

Whether the airline will be a success is up in the air.

It comes as more airlines ban babies, or banish them to the back of the plane.