Hi
A couple of hotels that get a regular mention for kids are The Holiday Village and The Sonesta Club, might be worth taking a look at them

The holiday village certainly had lots of kids staying when we were there last year, but I think you are best going during school holidays if you want your kids to meet up with others and make friends.

I think the Hilton Sharks Bay also attracts families, but it seems to have had a tummy bug lately.

As you have been before you must know the set up and that it is mainly all hotel based. The HV is in Nabq bay and fronts the beach and there are a couple of malls across the road that you can have a wander around if you need a change of scenery. Less hassle than Namma Bay.