tools needed:
knife (hunting knife, stone knife, etc.)
axe/hatchet
to keep it simple:
sharpened stick + rope + firewood = bow drill
sharpened stick + firewood = hand drill
when you try to ignite a fire there is a chance (random like finding apples etc.) that you will fail, the process should also take a while(about a minute gametime for the bow drill/2 minutes for the hand drill).
ideas?