In this set, I have made a model using the popular tensegrity technique. It is a submarine (completely disigned by me, not based on a real one) with an opening top viewscreen, a hinge on the side that opens to show the interior. On the inside are two marine biologists, one with paper and a wand piece 'pencil', and the other in front of the controls and the round viewport.
The bottom is a simple black base, plus 4 chains and 2 technic beams to hold the submarine up. The aforementioned submarine can, of course, be removed from the base to view the inside.
I built this as a first attempt at tensegrity, and believe it would make a great display or toy set, depending on the preference of the person.