This is a lesson I came up with this year, when I saw that some of my own personal work could cross over to the discussion of depth, dimension, and spatial relationships. I tried this with my smallest and most advanced class (especially since this involves Xacto knives!) and they loved it! It came out very well, and it's something I plan to continue in the future.
This sort of idea could be applied to some forms of computer art, as well, playing with the ideas of layers, if you wanted to try and apply this lesson to a digital setting.