Yes, absolutely. It's a huge time investment... again, you have to love it. I was playing for three years before I joined my first band - and I didn't think I was good enough at the time (I wasn't), but allowed myself to be pushed into it by friends. When I was in my late teens I would try to practice for as many hours a day as I could force myself to. I was trying to be Eddie Van Halen, or Yngwie Malmsteen at the time, and being a musician had become my life. Packing in 6 hours of practicing in a day was not uncommon then. I played guitar in bands for around 10 years before switching to bass, and then eventually vocals, and I never got anywhere near Yngwie. It's a tough instrument to master. - Pete

Jörgen, Bring your son to a local music store and sign him up for lessons. There's a huge difference between listening to your favorite music or watching your favorite band and actually seeing your guitar teacher do something that blows your mind. Encourage him to sit and try to figure out how to play songs he likes. I started playing when I was 13 (I'm 47 now). The best I can tell you is let him have his own experience with it, and if he loves it, you'll know. And he will HAVE to love it to become good at it... or even just mediocre. Guitar is an extremely difficult instrument to learn to play. You need to love it, or you give up. - Pete