First you have to find out what " the Banjo" means to him . Four string banjo for irish tunes ( often tunes in fiths ) and five string: open back for Old Time clawhammer style and finally bluegrass Erle Scruggs style.. You can have a look on Youtube at all three styles with him to at least get an Idea at what kind of music he is after.. search youtube for "clawhammer Banjo " "Bluegrass Banjo " "Irish Banjo"   "Tenor Banjo" and for a lot of fun look at "Kitchen Banjo " for George Farnby (SP)? style . The "Good Time" banjo is an inexpensive instrument that hold its resale value made in both 4 and 5 string models with an open back 5 string as well .. Resale is of interest if he decides to take up the mandolin next year . All the best , Guy