That made me laugh harder. I told them that they are silly to fight over a stone. Brothers and Sisters must love each other. Why fight over a stone? "I can't remember whose stone that is. You both settle it yourself." I told them.
This is how they settled....
Girl: I remember we both had a stone. That orange one is mine.
Boy: No, its mine.
Girl: What about the shell. This shell is mine.
Boy: No, this shell is yours. Oh! Sorry, its a bit ugly and scratched. I accidentally put it in my car bag and accidentally scratched it. This one is yours. We try to remember it so that easier next time lah. This one that is a bit ugly because I accidentally scratched one, is yours.
Girl: This stone is mine.
Boy: Ok. Ok lah. This stone is yours. And remember this shell that is a bit ugly already is yours.
End of Fight. The girl got the stone she wanted and the boy got the shell that he wanted and mummy just sat there laughing.