I second No Good Gophers and passing on AFM if you already have MB (or vice versa unless you are building a large collection).
WoZ/Hobbit are beautiful, but as others have pointed out, there are a lot of relatively recent "older" games that will appeal to kids (NGG, WCS, Pirates, Shrek, various superheroes)... would you rather have nice used examples two of those or one new WoZ/Hobbit?