Again, it may not be something your child would want to eat, regardless of what you think. Why don’t you eat lunch at the airport and bring snacks on board to avoid the uncertainty? Alternatively, you can probably post here after the flight about how you ordered a child’s meal that you thought your picky kid might eat and then he/she didn’t want it and had to go 5 hours without eating anything I can guarantee the responses then will be along the line of “why the heck didn’t you pack something????”