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I stopped by the LEGO booth at San Diego Comic-Con to tour the life-size models they had on display, including Aquaman, Unikitty from the LEGO movie, a giant Millennium Falcon perfect for posing, and a ginormous Thanos from Avengers: Infinity War that might be the coolest thing on the con floor this year.

In the video below, LEGO rep Ashley walks me through how many hours and blocks go into creating the elaborate models, how fans can get involved in the building process at the convention, and what it takes to become a LEGO Master Builder.