I think Fire Marbles as a concept are one of those things that's just dug itself extremely deep into my memory and nostalgia in a way that will never come out.
As a kid, i had one particular orange marble that i loved dearly that always reminded me of how i imagined them. The way the Myst novels described them just utterly captured my little overactive imagination. Me and my siblings used to just wander around in Riven and Exile for ages, perhaps not always completing the puzzles but just... soaking in the atmosphere.
One of the deepest formative experiences for my personal artistic journey.