I think this is a way that airlines and the FFA could continue to grow in consideration. At some point the economics of flying with children starts to make less and less sense. I just flew with a toddler that was under 2 from the mainland US to Hawaii and back. The toddler is just under 2 so he was considered a lap child to fly free. However at 2 the child for most airlines graduates to a full price ticket. At that point it seems less and less likely for families to want to fly over driving. Then add more children you are spending something of a small fortune to fly anywhere. It seems like the airlines could capture more business if they could price into their model a discounted ticket for children older than 2 but under a certain age (ie. 13 or 10).