This is excellent advice. I don’t have kids, but I have spent a lot of time in Asia and it is not uncommon for flight attendants in Asia take toddlers and babies and play with them in the galley for hours on end. I travelled with a friend and his toddler on Silk Air (Singapore Air’s budget airline) and he pretty much handed off the kid to the attendants at the beginning of the flight and picked him back up at the end.
And in some children it can cause explosive diorrhea, which is not a good thing in an enclosed space you can’t escape. REALLY test this if you’re planning to try it.