Sorry folks - it's been night here, so I've been sleeping.
It looks like KF25 hasn't put in orders, but as he's a first poster, he may never come back. I've sent a PM, which he hasn't opened. I'm going to let that Marvellous Fellow, MarbitChow, take his place. I'll process orders in a moment (which is to say, an hour or two).
As I am a generous person, I will say the following -
You don't need stone to make an axe or spear - the Marbits find one on the ground.
Look again at the events of the exploration - specifically, how much move it cost to leave the hex. And then imagine what a defenceless Marbit in a foreign hex does for an entire not their turn, turn?
If you can think it, you can do it. By and Large. But remember the theme - survival.