K.D.
My friends son was diagnosed at 18 months. It is a stressful thing, but it is amazing how these children quickly learn their bodies....by 2 1/2 he could tell his mother when his sugar was low and by 3 1/2 he was on an insulin pump which made things much easier....he is now seven years old and can program his insulin pump all by himself based on what he eats. He is a fun, energetic, hapy little boy.....it is a tough journey, but your nephew will be okay!!! Best of Luck!!