Arik52 has the right idea. The staircase is built into the
platform and then rotated around to show a different part of the set on the other side.
I'll
call them cubes sense that seems to be the best term. The show is Cinderella so I'll use those scenes to describe it. The cubes are first seen in Cinderellas home with a firplace on one
block and a staircase on another, the other's just have a side on them to look like the
house. The blocks are then rotated around by crew members to the other side of the
stage to make the Castle throne chambers. They are then rotated once again, showing that pieces of a staircase have been built into the rotating platforms. when the blocks are put together they form one
level of stairs(from the
ground to the top of the blocks where actors can stand) then another
level starting there to the very top where Cinderella will make her appearance at the ball and where the prince and her will be married.
I dont know if that helped at all, but thanks for trying! I'm meeting tomorrow to discuss the set and we may just change our idea, this is just what the director wanted us to try. Thanks again for trying!