Very basic design of what could be a pen/pencil holder (for two different diameters) for an artificial Python Hand. In enablingthefuture.org they do such a great work sharing designs to help children get an artificial hand that I wanted to provide my idea for a pen holder so others can improve it and eventually print it. I have no experience in 3D design that is why my design should be taken as an idea to improve, but not a final one! I used the simple basis provided and a clip from tinkercad created by someone else (thanks!). I believe a little wall should be added to prevent the pen or pencil moving upwards once one starts to write and press against the paper...