I wouldn't "DEMAND" anything. . .in over 10 years I have always requested a fruit plate on all of my flights. It was boarded twice. Never even thought to ask for anything.

And I'm sorry, but if you're travelling with a child why would you leave it to the airline to ensure there is food for your baby? Isn't that really your responsibility (and please, no flames on this; I just for the life of me can't understand why folks think it's OK to leave this up to the airline).