Have you looked at the Grande Real Santa Eulalia Resort in Albuferia? Although self catering it has the children's club and for a luxury property is good value for money.

Alternatively Le Meridien Limassol Spa and resort in Cyprus offers family rooms.

Another popular property for families with younger children is the Le Meridien Chia Laguna in Sardinia. They have free kids clubs, family cottages and you could keep the price down a little bit by flying with a low cost airline to Sardinia.

If I can be of any further help please do not hesitate to ask.