I can't think of the main points to talk about. I plan on talking about the history of the guitar as well as the versatility, but what else?

Do you guys have any suggestions? Songs that I should play?
under the bridge
Fender 1998 Mexican Strat(black)
Squire Bullet(blue)
Silvertone pandera(black)
Boss DS-1
Electro-Harmonix Small Clone
Digi Teck RP-80
Marshall 60wat MG
play a big old montage of songs important to rock/guitar history,without stopping,like play each reconizoble part

start with a robert johnson

end with steve vai