When we are on the road, we always have a few emergency pens with us to keep our kids occupied, for example, in a restaurant. Since the original cardboard box fell apart I designed a replacement.

Print in 0,2mm flat on the bad. If you want a multicolorprint, just paint the colors with the fill feature of the BambuStudio, the (german) text is extruded with 0,01mm so it will make no difference if you don't color it.