I tend to agree with Liz... and the Wiggles use this to good effect with captain Feathersword. Little boys can be like tiger cubs, they want to be able to test their strength etc but you can channel it in safe ways... and as always lots and lots of communication about the consequences of real fighting makes a difference.... although I was surprised to learn that children don't understand the concept of death until they are about 7 (I think that was the age)... slightly off topic... but interesting... anyone heard about that?