A Lego set is a kit that you can buy — say, at Toys R Us or Target, or directly from Lego. Sets are produced by Lego as a commercial product. This, on the other hand, is a fan creation, with no custom parts whatsoever. No pieces were made specifically for this, just clever connections with parts you might already know. » 12/05/13 11:16am 12/05/13 11:16am