LEGO sets are a classic holiday gift, from big-ass sets that take hours to complete, to stocking stuffers. If you need a show-stopping gift for yourself a kid in your family, I guess, Amazon is taking having a BOGO 50% off sale on 18 different sets. Lots are pop culture skewed, like Batman, Star Wars, and LEGO City, but there are a few for the more hobby-focused too.