QR codes have enough capacity to store small @freecad@social.freecad.org scripts/models. This is the makeBottleTut example from https://wiki.freecad.org/Topological_data_scripting#The_script 547 bytes after compression. The script opens makeBottle.png unzips the text from the QR code and executes it. Scripts: https://gist.github.com/kwahoo2/38560d14c913fdf83fa9737b71fd18f5