It's always been difficult to decide what to bring back from travel, but this article
https://selfievegas.com/what-to-bring-from-las-vegas/ helped! Vegas is a vibrant city, and the souvenirs here are also unusual. For example, playing cards straight from the casino, Welcome to Fabulous Las Vegas themed merch, or even a unique bottled cocktail from Fat Tuesday. I also liked the idea of bringing a chip from the casino - a small but atmospheric thing that will definitely remind you of the trip!