based on Google's image search, you are shown a set of images and must guess the search term used to find them -- could use it with students, calling it Guess the Keyword
"Plotz will create a hollow sphere (and now wizard towers and observatory models) of your chosen size and you can then step through the layers to see how to build it. Plotz will also print a full schematic including a 'ghost' of the layer below to help you position blocks."