Hotel in Dublin for kids?

[Hillsalt]

I plan to spend a few days in Dublin with my wife and 2 kids (aged almost 2 and 3) in May. I know Dublin like the back of my hand but I want a nice hotel which has activities for kids (swimming pool, playground or games room etc). Location is not important as I will be taking the car and I won't be out on the beer everynight (gone are the days...!) so I am willing to be a away from the centre.

I'd prefer a 4 star hotel as it is also a treat for the missus so a Spa would be a welcome bonus.

Thanks in advance.

 

[Dublinchick]

I stayed at the Castelknock hotel over Christmas. It was very reasonable as far as I remember, and its a lovely hotel.