I originally designed this to create a dry fire target course across the house to practice for USPSA shooting matches. I couldn't find anything like it so I threw something together quickly with Tinkercad. 

This would work on most single wall corrugated cardboard. Im sure it would work on various other related projects. 

I suggest printing 0.3mm layer. 3 wall thickness. Infill shouldn't matter as it will print solid at these settings. If not, opt for 100% infill.