Visited Bath for the first time last week with my husband and 2 year old son and would definitely recommend a visit. The Spa Baths are centrally located and easy to find. We drove in from Bristol and parked about 5 minutes out of the centre. It was £12.25 per adult, so a little expensive, children under 5 are free. You can also get family tickets which includes 2 adults and 4 children under 16 for £35. Once you have paid you get an audio tour unit which is available in English, French, German, Spanish, Italian, Japanese and Mandarin. There are free hourly tours, if you want to go on one rather than walk around yourself and listen. The Roman Baths are wheelchair accessible, but I did not use the facilities so cannot fully comment.

We spent about 1 hour 45 minutes looking round, there are various exhibits explaining the history of the Baths and how they have been restored over the years and there are video and visual representations of what life in Roman times would have been like, for example men and women bathed separately. The tour takes in the following, the Entrance, the Terrace, the Sacred Spring, the Temple, people of Aquae Sulis, the Temple Courtyard, objects from the Spring and its overflow, the Great Bath, changing rooms and saunas the heated rooms and plunge room and finally the obligatory shop.

The entrance is where you pay and get your audio tour. The terrace over looks the Great Bath and is lined with statues of Roman Emperors and Leaders. The sacred Spring lies at the heart of the site where the water is heated. The Spring overflow is where the surplus water from the Spring, not used in the baths, flows out to a Roman drain. The changing rooms, saunas and plunge pools are under cover and from memory I think they used to be more open.
The whole experience was very enjoyable and relaxed, I imagine it would get very busy during school holidays and at the height of the tourist season, so would recommend going out of season to be able to get a good long look at everything. Taking small children was not a problem as there is lots of stuff for them to see, the only problem we had was our little one kept wanting to get into the water for a bath! The water cannot be touched, though I did before I saw the sign and it was lovely and warm.

The staff were all nice and helpful and if there are children in the party you get a sticker set and map. You use the map to find certain things and put the stickers on the map to show you have found the item. Some of the staff are dressed up in Roman attire and are happy to answer any questions you have.