Edison robots - simple pen holder

thingiverse

I came up with this simple pen holder as a quick fix to transform our Edison Robots into "draw-bots." I began with the basic LEGO brick found here: https://www.tinkercad.com/things/1FSUvYnxIng-lego-brick#/ and created the rest in Tinkercad. The pen holder is designed to accommodate a Crayola fine-line marker perfectly. After printing, simply snap the piece onto the back of Edison and slide the marker into place. In my testing so far, the part fits snugly and securely on the Edison's LEGO-size pegs. However, the part's pegs do not lock well onto other LEGOs.