I really didn't ought to be replying again, but I am, so there ya go.
To all those people advocating corporal punishment, can I just point out that, legally, that is Assault, and carries a heavier sentence than Criminal Damage.
I was never smacked as a child, either with the hand or with any sort of implement (aka weapon), and I have never had any form of dealings with the police.
To reiterate my previous post, I am not trying to belittle what the child did, but violent reprisal is not the answer. (IMHO).