Advice 12 Day Ireland Itinerary Advice for Family?

Hi, this will be the first time in Ireland for my family of four (kids are 12 and 8)! We're planning a 12-day trip and could really use some advice on how to make the most of it. We're interested in a mix of cultural experiences, nature, and activities that are kid-friendly. Any recommendations on must-see places, hidden gems, or tips for traveling with kids in Ireland would be greatly appreciated. Also, how should we balance our time between cities and the countryside? Looking forward to your suggestions!