Vexillology is the study of flags, and it's a perfect rabbit hole for the curious mind: every flag is a tiny design brief loaded with history, symbolism, and surprisingly strong opinions about what makes a good one.

You can go deep on the history, collect flags, or try designing your own using the field's clear principles.

The honest reality is that it's a low-stakes, cerebral interest rather than a hands-on craft — the payoff is knowledge and a sharper eye, not a physical object.