SmugLug

I'm in a similar situation as OP, only instead of surgery my doctor is hooking me up with special glasses. When he got the prescription to work in the test frames, it was mind blowing. He let me walk around the area to see if I would be able to handle the 3D explosion, and two facts jumped out at me (heh):

1.) Chain link fences are BEAUTIFUL. The fine grain of the foreground wire against a distant background, particularly if there is perspective on the fence, is stunning.

2.) I understand the attraction to big boobies now. It seriously had never clicked before, and then with the glasses, BAM. Big boobs are awesome.

I'm writing something about a very primitive society with zero access to wood or fire. That basically leaves them with rocks and animal products.

Are there materials in this context that one could make an atlatl out of? What about spears? Are they only good for flinging spears, or does just about any thrown weapon benefit from the extra leverage?