To let adults travel in peace, Malaysia Airlines will not allow children under 12 to sit in the upper deck economy-class cabin of its A380 aircraft, unless there is overwhelming demand for it. (See this post on its Facebook page.)Â The airlineâ€™s first A380 service will be nonstop from Kuala Lumpur to London, scheduled to start July 1. A second non-stop service to London will be added on August 25. Last year the airline announced it wonâ€™t allow infants in the first-class cabins of the A380. The airline has placed an initial order of six A380s.