how to help a young kid

[JaBlue]

My brother is 10 and really, really, really smart. Def smarter than I was at his age and (I'm told) I tested for IQ of 140-155. I found it very hard to make friends because I thought all kids my age were immature and annoying and consequently had friends all 1-2 yeaers older than me. Being social wasn't a problem for me, but it is for my brother. His interests are extremely esoteric for his age - conservationism, biology, blah blah - and he is having much more trouble adjusting than I did. He also lacks confidence, has a nasally voice, and is rather uncoordinated when it comes to sports.

I want to know how I can help him out. I will be able to visit him probably only a few days to a few weeks a year because we live on opposite coasts but I will be in touch on the phone weekly and give gifts on important days.