Train your Kids For Ramadan

At the website Islamicnetwork.com, one of the moderators tells his board members:

At 10 if they do not pray, you ‘have’ to hit them.

Before that and for anything else, it’s an optional thing. But at the age of 10, you ‘have to’

So at the age of 5 if they look funny, you can probably hit them.

This professes to be a "moderate" site.