People are suckers for nostalgia. This is a well-known fact that even the LEGO company has been tapping into lately. It is no wonder that this creation by Bob DeQuatre is hitting all the sweet spots. It is a rebuild of the 6175 Crystal Explorer Sub from the Aquanauts theme. This version is quite a bit larger than the original. The cockpit manages to fit 3 seats and a hatch to access the ocean. I am not sure, as it is not mentioned by Bob, but I can imagine quite well that the big trans purple windscreen from the Pop-up Party Bus was the starting point of this amazing build. To top it all off it even has working lights.