I would love to design DIY (Do-It-ourself) drawing prosthesis. Feel free to share with me if you develop your tools, it will give me joy. I am also interested in the idea of drawing machine or generative drawing (made by an autonomous system). Here is one I made with tape, an electric shaver and a pen. It requires a smooth surface and produces circles.

Here are other ideas :)

Daniel Ben-Hur

Baycrest

Henri Matisse

Eva Kotatkova

Max Mertens

Tim Knowles