| Careful when it comes to A1C numbers and children. Opinion is somewhat divided about what is right for children. A lot of people in diabetes medicine prefer to suggest that children can reasonably safely get away with slightly higher A1Cs than adults.
I personally would consider an A1C of 7.2 for myself as 'reasonable', but with a lot of room for improvement. For a 4-year-old, I'd say it's pretty good. Try and keep in under 8, and once he's been through puberty (I know, that's a **** of a long way off!) look about getting it under 7. | 
