I took my 5 and 2 year old here on a rainy day. They loved it! They loved the people dressed up in old clothes, the stories of how they lived, what they ate and the songs. My 5 year old loved going up the old windy stairs and looking out from the top of the castle. The only difficulty I had was its not pram friendly and there are lots of stairs.
Great tour, entertaining and educational.
It's worth the visit to this little town if you want a half day trip from Dublin on the DART. If you are a U2 fan, you could do a pilgrimage visit to Bono's house, there are nice views from the hill.
Castle Street. Dalkey, Co Dublin (not castle street, dublin, d1 ireland)www.dalkeycastle.comsource; Dublin Pass