This has been opened and built by my son and I. (One Time) Howeverr, I can assure you that every singlele piece of Legos are in the box along with the instructions booklet. I take pride ine in our Legos sets as we are collectors. Also I have sold several Lego sets on here if you’d likee to take a look at my reviews. I have never misplaced a piece of the lego set.