It looks like a pup, which means your plant had a baby! I could be wrong, but that's definitely what it looks like.

Is it? Cute! I hope I haven't harmed it by having a closer look; I do admit it seemed so strange to see "roots growing leaves"...

Thank you, in any case!

Cover it back up and it will emerge in its time more ready for the world than it is now.

Little guy doesn't seem to want to be covered up... I actually had a hard time doing so! But it's down again and, hopefully, it'll grow some more... I feel like shouldn't have touched it; but now that I know, I'll be more careful next time... had already seen big pups but not tiny ones!

That happens to all of us - now you're experienced!

Indeed! Thank you for your help; learning is always so interesting!