gluten free?

Bradyn had her four year check with the doc today and we talked about her frequent stomach aches and the doctor suggested trying a gluten-free diet for a few months. (Steve has been suggesting this for a while.) Anyway, on the way home I told Bradyn that she was going to eat like daddy for a while. When Steve came home for lunch they hugged and rejoiced that they get to eat like each other. Later, as Steve was finishing his lunch Bradyn came out to beg a chip off of him. He gave her a Frito. She turned around to leave and then turned back and asked, "Are these gluten-free?" How many 4 year olds know what gluten free is?