Both of my boys are DL, NW, US and AA. Both had their first paid flight at less than two months of age and are now 4 1/2 and 20 months. No lap sitters with these two and when I worked for the government they got their own tix on my travel orders. My cousins two boys in VA Beach are also seasoned veteran FF's and have done the FRA-ATL run on DL more times than she can count.