Unfortunately it rained every day we were there. We braved the weather to visit Bunratty Castle and Folk Park. It's a fabulous place to visit - they have restored the 15th century castle there, and recreated lots of 19th century dwellings such as a fisherman's cottage, or a wealthy farmer's house. There is also a 19th century street recreated with a sweet shop, drapers' shop, pub etc. I especially enjoyed the walled gardens and the watermills.
We had better luck with the weather at Craggaunowen, which goes back further to prehistoric times. It has recreations of neolithic dwellings, including a ring fort with a souterrain (underground storage for food and valuables), which provided the highlight of the whole trip. Ed spotted a small cluster of bats roosting in there, and we got to watch them from extremely close up. I don't know what's going to happen to them now, as I believe they are protected in Eire as they are here in the UK. Either they'll have to be moved, I guess, or the souterrain closed to the public. Either way we were extremely fortunate to see them.
We also visited King John's Castle in Limerick and saw a trebuchet being fired, went swimming in Tralee Aquadome, the kids played in a den with a rope swing my sister Steph had made the week before among dad's hedgerow, I played traditional music with my sister, Lindsey, who was there at the same time, and we enjoyed cooked Irish breakfasts every day, and delicious home-cooked food every evening. Even the mini-bar was free. It beat staying in a B&B hands down.