Unless he can portray Jolee Bindo or a 10 year old convincingly, I'm not sure there's a point.
But if he wants to try, here's a video of Jolee Bindo featuring plenty of examples of his voice.
Jett Darklighter (open to anyone that can realistically perform as a 10 year old - yes, that means this role is open to women and men)
Think Anakin Skywalker from Phantom Menace, but a lot "cooler." A boy whose Force abilities are just starting to blossom . Confident but innocent. He has faced some tragedy with the loss of his parents, but it has not discouraged nor diminished his optimism. His parents started him on his journey to be a Jedi, and he is determined to finish it. A likable character.
Jett is from Tatooine. He's a Darklighter which was the same family that will give us Biggs Darklighter, Luke Skywalker's boyhood friend and hero (Biggs' x-wing is destroyed by Darth Vader during the attack on the Death Star). From Jett's dialog, it is implied that he was in Anchorhead during the events of Kotor 1, and felt the presence of the K1 player character.
Your audition lines are:
746jett003: Jett Darklighter. Why?
746jett004: Are you a Jedi?
746jett005: I don't know. Just a feeling I have, I guess. It's like something calling out to me.
746jett006: Once, I think. Back home on Tatooine a few years ago, I was with my parents in the port of Anchorhead when I felt someone or something through the crowd.
746jett007: Well, since you asked, I'm faster and quicker than most other kids when we play. I can kind of see things happening before they actually do. Oh, and I have these dreams.
Jolee Bindo
The largest role and - c'mon - you know who Jolee Bindo is.. 'Nuff said about his background.
Here are the audition lines for you:
740jolee001: Well, I wasn't expecting anyone, so if you've come for dinner...you're late.
740jolee002: Hmph! Well, if it's not food you want then what can I do for you?
740jolee004: Ah, what is there to tell? Jolee Bindo is the crazy old man wandering this dangerous world. I'm content with the impression I give.
740jolee017: I can't recall that we've met before, although the memory is not what it once was. Do you know Hartoth or Andor Vex?
740jolee018: Too bad. Ah, the stories I could tell you.