If you do not know how a bone forms from birth, something which scientists can actually observe, why would you even start to think you know how it developed from nothing?
Well, folk actually have a pretty good idea of how bones develop throughout the growth process. If you go to Google Scholar and search on "bone development" +embryo you will get several thousand papers on the subject.
The other mistake you make is when you say "how it developed from nothing". It is only Biblical Creationists that think something developed from nothing. No biologist would consider such an assertion. Certainly the Theory of Evolution does not make that assumption. Not even Abiogenesis has such a silly assertion.
Only Biblical Creationists think magical poofing of something from nothing happened.
Aslan is not a
Tame Lion
™ Version 4.2