My son will be 5 at the end of March. We are currently doing "preschool" work together and he will be done with the workbooks and, I feel, ready for kindergarten work starting in January. My husband is concerned that he will be done with Kindergarten a year before most kids his age. I feel that if he can do the work (and he LOVES school) then it is ok to start him this Jan. and not to worry about his age? What do you ladies think?