and with all the guitar players on here it will quickly climb to 100 posts..

maybe for the right hand technique you could tune to an open tuning
so it sounds good without needing to use the left hand..this also
might be helpful in learning barre chords..just moving up and down
the frets with open tuning.

it sounds like (i do not know thos musicans) he may prefer to strum
rather than findger pick.

maybe some individual melody note picking would be good too..
fiddle tunes are good for this.

the C-A-G-E-D system is a good one for learning how to make various
chords in different places on the finger board---so i hear...

learning I IV V chords is good--esp. with 12 bar blues..

You can get some good books at the music store to help you along.
or a video (DVD) which shows details.

www.melbay.com/ is a pretty good source. Also Guitar for Dummies..
by Phillips and Chappell--a book with the editor of Guitar Magazine.
www.dummies.com
there is also another disc..."Easy Guitar" from www.ARCMedia.com in Canada which is a CD-ROM that offers printable lessons fro acoustic and electric. Which type of guitar will your nephew prefer?

Also check out www.musicansfriend.com where they have about 40
titles of guitar instruction books, DVD, videos, etc.
It is the next best thing to hiring a teacher!