[Rick Lee]

Start off with songsterr.com. It's free and plays the song while the TAB streams. Pick some simple songs he likes and I guarantee he'll practice. When you can make something recognizable pretty quickly, it's very satisfying and makes you want to learn more. Technique and theory will come later, but to get him practicing, he needs to play stuff he likes.

I got an acoustic when I was about seven and the first Van Halen album came out. My teacher looked like Grace Slick and had me playing Love Me Tender and Mary Had a Little Lamb - the kind of stuff that made me hate that guitar. I quit and didn't pick it up again until my best friend in 8th grade introduced me to his teacher, who was a rocker. I never wanted to stop playing after that.