Well, i suggest getting a good set, that way, when he's older, he doesn't have to worry about having a good one and saving all that money up day after day of hard work, (i remember it like it was yesterday)... not too expensive though because (i don't know how your son is) he might not handle them properly... i might be wrong though, i started pretty young
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I make world class music, I just forget to write it down...