Evrythng by Petrucci,Malmsteen, Vai, Satch, Gilbert...would do the trick but those stuff might be hard to play for a 12-year old kid. The Duel from Crossrads is cool too and when it comes to sound solos wich maby don´t look to cool on the fretboard, Hammett, Slash, Ace Frehley stuff. Thunderstruck intro could be somthing too.

But if you wonna kill evrybody with your godness, play Serrana arps. by Jason Becker.

Good luck do.