Set sail into history with the LEGO Ideas River Steamboat (21356) for adults ages 18 and up. This fan-designed masterpiece captures the golden age of river travel through meticulous brick-built craftsmanship. Adult builders can construct an authentic paddle steamer complete with a working paddle wheel, detailed pilothouse, crew quarters, and a functioning steam engine with visible moving parts. As you build, discover intricate details like the music stage, restaurant, and vintage furnishings throughout every deck from the elegant passenger areas to the bustling engine room. The completed model doubles as sophisticated home or office decor that transforms your space into a nautical museum. An ideal gift for boat enthusiasts, history lovers, and men and women who enjoy detailed model building kits, this collectible offers a relaxing creative experience that celebrates maritime heritage. For an immersive build, the LEGO Builder app provides helpful 3D viewing tools and progress tracking. Contains 4,090 pieces.