Amy McRary, Knoxville News Sentinel Published 11:32 a.m. ET Feb. 11, 2020 PIGEON FORGE - An autistic boy's fascination with the Titanic ocean liner – and his ability to build with Legos – gave him a lifeline to independence. Brynjar Karl Birgisson was 10 when he spent 700 hours over 11 months building a 26-foot-long Titanic replica using 56,000 Lego bricks.