Takes on Worldbuilding and how Objects work

OHOHOH I get pretty in depth into this in tbc!

I have a whole ton to say about the worldbuilding in tbc but we'd be here all day (unless. you want me to say them)

I've Always Liked to Think of Object Anatomy as a More Ephemeral Thing Personally. I Like to (Semi-Facetiously) Say Object Limbs are Made Out of Stardust and Dreams Because I Think Its Cute and Plays Into a Thing I Like in Non OSC Animate Object Stuff Where the Object is Alive Because Someone Loves It Very Much. Think Velveteen Rabbit or Brave Little Toaster  . I Guess I Personally Just Dont Have It In Me to Worldbuild Haha! 

omgggg this is actually something have thought a lot about! :D
i have a whole worldbuilding project based around speculative object evolution. this is the write up i made about it

The archaeological record has no record of the existence of any beings with biological similarity to modern objects before 28 million years ago. At around this time, our first ancestors appear on the fossil record seemingly out of nowhere, and began to proliferate at an extremely rapid rate. This has led most modern archaeologists to conclude that around this period, Earth was either colonized or accidentally discovered by a highly advanced alien species. Historically however, this has instead been interpreted (and still is by many today) as evidence of divine intervention.

Regardless of their origin point, it is clear that these beings seemingly had the ability to shape their physical form into whatever they chose through rapid metamorphosis. DNA analysis on samples of res metamorphendis specimens indicates that a very significant portion of the genome was dedicated to passing on information from the parents' brains during reproduction. Many have speculated that our early ancestors may have achieved some form of genetic modification with technology from their origin planet, which was quickly lost after several millenia on Earth. It is believed that originally, this area of the genome may have served as an artificially engineered form of immortality, allowing these beings to pass on an entire map of their memories to their offspring.

Over the next several millions of years, our early ancestors continued to evolve to fit their new environment on Earth, in the process seemingly losing many of these advanced abilities that couldn't be sustained without continual genetic modification. Whereas early res species maintained at least some aspect of the ability to transmit memories to their descendants, this was slowly but surely lost as evolution progressed. By around 20 million years ago, this area of the objectial genome had fully taken on a new purpose: it had become focused specifically on passing down a map of their parents' categorization of the world around them: e.g. things that were edible, things that were safe for shelter, or things that were dangerous. This categorization also made it much easier for their descendants to take the same physical forms as their parents, as they were born with understandings of these forms hardwired into their genetic code.

The res habilis species first appears on the archaeological record around 8 million years ago. At this point, early objects had not yet fully lost the ability to metamorphize their forms, but the specific forms that any one object could take were typically in the single digits. It is speculated that these forms were often used for camouflage. Fossils found of r. habilis that died in hunting accidents show that plant forms were common, allowing them to blend into their environment and avoid detection by predators. Other forms may have been used for ritualistic purposes: analysis of r. habilis burial sites in modern day Zambia indicates that members of the species typically shifted into a form resembling a smooth river stone before death.

Around 5 to 7 million years ago, the first anatomically modern objects, res sapiens, had been born. These early objects, in addition to being fully bipedal, had completely lost any ability to metamorphosize their forms after birth. The section of the genome that had once been focused on passing down ancestors memories now solely past down information about what "objects" their parents physical forms had been metamorphosized to resemble, as well as their own perception of what other "objects" were similar. This information from both parents was then combined in the womb, leading to offspring retaining an "object form" that retained some physical attributes from both parents, while also resembling an inanimate object that their parents had perceived during their lifetime.

Soon after this point, early objects managed to spread around the globe, outcompeting a similarly intelligent (but genetically unrelated) species known as homo sapiens, who were quickly driven to extinction. Much research has been conducted on the potential co-evolution of these two genera before this point. It is sometimes speculated that attempting to imitate members of the homo erectus species may be why bipedalism first emerged in objects, although this is highly debated. One much less controversial theory claims that the first tools used by ancient objects were likely directly traded or pillaged from homo sapiens, as human settlements and burial sites have been found that contain tools at least several millenia before the earliest object tools appear.

Not long after this shift, the first "implement" objects were born, likely as the children of geological and/or wood-based objects. Their numbers were small originally, but as objects continued to transform their environment around them, and thus their own perception of the world, they have slowly but surely grown to become the most common kind of object, outnumbering their older "natural" object neighbors. Other kinds of objects would slowly begin to emerge as well. The discovery of fire rapidly increased the amount and diversity of food objects, which had originally only taken the form of simple scavenged products such as eggs, meat or fruit.

(the rest of history proceeds to occur basically the same as it does in our universe)

That's understandable. I have difficulty trying to explain mine as well.

y'all make me want to explain the actual world now so here goes
TBC is set on a planet smaller than earth, called Fiearth (field + earth). It's a superflat planet, where there is exactly one mountain, but it does have everything that's down under (ravines and caves and proper ocean terrain). It's technically artificially created, as there are gods that made it and they're implied to be real. Time is slightly shorter there, and seasons range from rainy to dry to Scorching Hot.
There's a lot more little things surrounding the objects. They have access to little magical artifacts called "godly marks" that are magical items, although many of them will be very harmful if overused. Their procreation actually relies on godly marks!
(Why are they called godly marks? They were created by the gods as a way to leave their mark on the world.)
Their world otherwise is rather similar to earth, but also different due to the superflat geology and the way objects interact with fauna. Animals are also a bit bigger than earth ones. 
Animals have the ability to digest magic and turn it into usable organic energy, so they prey on objects (every single animal big enough. no exceptions.), but more for the sentience dust, since they're a strengthening agent when consumed (but also with other effects). In return, objects will also eat animals, if they have the opportunity to.
Speaking of eating, these objects have no organs, so they can eat practically everything! They have teeth strong and sharp enough to break rocks!
I have even more than this, but I'd rather show you guys the tumblr posts I've compiled for them instead, so feel free to ask!

My personal take is that the limbs are made out of ink ore and their bodies are infused with it as well. Ink ore is a special material, you can breathe life into it. Stickmen in that world are also made out of ink ore. Only other living beings can make a creature out of the ore, which is why mass-production of objects is not possible.