bump cap
thingiverse
There's a low stone wall infront of my house, with sharp pointy corners and where kids run past,.... and occasionally fall. Just to be sure they do not fall on the corner I made a generic corner bump cap. Easy to glue or tape on with double sided tape. Can also be used indoors.. obviously. Maybe it comes in handy for you to.
Download Model from thingiverse
With this file you will be able to print bump cap with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on bump cap.