I'll just throw into the mix, not to forget he's a boy. Both my gifted boys (as well as many others I know) had no interest in reading in K primarily b/c they were not interested in Biscuit, or Spot, but rather some sort of DK book or encyclopedia about space, history, science etc. A fun resource for helping them is Mimio/Headsprout. It does a really good job of bridging that K-2 gap and teaching them the reading and comprehension with "higher level" interest including space, history etc..