Math(Pi) bookmark

I borrowed idea from your bookmark. I thought, that blank space on bookmark is usefull for something other, like text. Simply with Openscad you can add any text and symbols, as long chosen font have these symbols.
I borrowed idea from your bookmark. I thought, that blank space on bookmark is usefull for something other, like text. Simply with Openscad you can add any text and symbols, as long chosen font have these symbols.