You can always find the menu for the regular meals on the EK website. The meals are good, but cater to a pretty broad taste, so unless your child is a fussy eater it's quite likely that one or both of the "adult" options are fine. By sticking to the standard meals, at least you know in advance what you're getting.

Be sure to select the economy class options, assuming you're in Y, as first class is the "default" choice. http://www.emirates.com/english/flyi...ce_finder.aspx