For the past 4 years we've visited Kenmare for the Easter Holidays. Our kids ages range from 8 to 13 and the drive is a long one from Dublin. It's a great place, with lovely restaurants/pubs that are family friendly. If you can get past the car trip, you will all have a great time. Our kids all use sea bands and thankfully we 'appear' to be over the dreaded car sickness.
See this link for things to do in and around Kenmare
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