This is my take on a skateboard and scooter hook to keep the kids' gear off the garage floor.
Printing with PETG, 2 perimeters, and 15% infill seems to be pretty strong and stiff. I printed some with 4 perimeters for extra strength. I did not try PLA.
The author remixed this model.
@daveh_dev's design (here) was by far the best design I found for a scooter hook. However, I wanted to try a few tweaks to get a more rounded/compact design without sacrificing strength and stiffness. I used some internal holes (hollow tube profile) to keep the strength high.