The boundary stone was used to separate groups, if the boundary was crossed without an invitation, the person was speared.
It is like an invitation stone. It’s like knocking on the door, and asking permission to come inside.
The artefact that looks like a curved piece of wood is a cradle, called a Kullman. It is used as a baby cradle and they push it to rock. It was also used to carry loads of anything.
The stick, next to the Kullman, has a bushman’s close peg at the end of it (a black nut that opens). This was a training stick, and used by children. It may have been the only toy they had. It taught them, how to put that stick up behind their head, and throw it like a Woomera that launches a spear, and they learnt that the nut would come off the end, and would hit what they wanted to hit. The children learnt to be accurate with throwing a spear, and they learnt how to use a Woomera.