Here is another cool gift idea for Lord of the Rings fans. The Lord of the Rings Black Gate of Mordor Building Set has 6339 pieces and is LEGO compatible. It measures 43.3 x 14.5 x 16.3 inches. It does take some patience putting together but instructions are included to help you along the way.
NerdyNow is selling this on Etsy. You can find out more here.