There are very few options available online. Previously, I purchased a standard ground‑anchor protective cover from an e‑commerce site, but the real‑world experience was disappointing: the material was rather brittle, and after just a few bumps outdoors, it cracked and broke. It provided only minimal visual warning and offered no meaningful impact absorption or protection. Driven by the desire to address these safety shortcomings, I independently designed this 3D‑printed protective sphere. Its smooth, rounded shape ensures high visibility as a warning device, while its robust shell effectively cushions impacts.