My daughter asked the non-stop trail of 'why' probably from 2 to a little past 2.5. She's a little over three now and her questions are more like 'how do you spell that word?'. She'll ask me word after word, after word, on how you spell it. Or she asks more complex questions than 'why'. I personally wouldn't be concerned because I think every child, especially gifted children, process information and gather input in a different way.

Z - 01/23/11 and O - 05/12/13