With flint, bone and wood (and vines if you are able to find them) it is a fairly simple matter to make basic tools.
With those, and the resources you listed, you can make ropes, shelters, timber, boats, kindling, rudimentary clothing and probably a lot more that I'm too tired to think about right now.
A knowledge of basic physics principles would help (fulcrums, leverage etc), which is something we are far more likely to be conversant with than Joe Caveman.
I'm off to bed now anyway so no moving me to Caveman Island while I'm asleep * eyes thread suspiciously *