The one I am most concerned with (aside from the unmotivated 10 yr old) is my 5 yr old. He frequently says he hates school and cries sometimes. When I ask him why, he says it's because "It's too long". He doesn't really seem academically advanced (I say this of my 10 yr old too though) but he just learned to read very recently and has progressed quickly and can spell out fairly difficult words for a 5 yr old who couldn't read 2 months ago. Gifted education starts here in 3rd grade so they won't test until 2nd grade. The thing is that he has a vastly different personality than my older gifted kid.
