[img]https://brickinsights.com/index.php/crop/teaser_compact/sets/6831-1.jpg[/img] 
[url="https://brickinsights.com/index.php/sets/6831-1"][b]6831-1 Message Decoder[/b][/url] 76 / 100  
[url="https://brickset.com/reviews/set-6831-1"][/url] 76 / 100  
[url="http://guide.lugnet.com/set/6831"][/url] 76 / 100  
[url="https://www.youtube.com/watch?v=dVal3Z4W79s"][/url] by Jang