We visited the Lunt Roman Fort on the same day as visiting the Midland Air Museum at Baginton Airport. Quote a contrast, but they are very close to each other and are both good places to visit for just a couple of hours or so.
There is a small charge for visiting the fort which is paid at the desk inside the granary building.
The entire fort area is laid out, but mainly just an outline of where the buildings used to be. There is an impressive entrance and arena and the Granary has been rebuilt as a museum building. The entrance was built in the 1970s and is showing some signs of age, with limited access, as whilst you can still access the first level the top is closed to the public.
We arrived shortly after one of the tours had started. We tagged along for a short time, but whilst I found it quite interesting the two children with me (age 6 and 7) were not particularly interested so we left the tour to explore on our own.
Inside the Granary there is a model of the Fort as it would have looked, and some hands on activities including some old Roman games and some crafts.
There is no playground for the fort, but just across the road is a large village playground (a small part of which is in the photo above).
The children enjoyed the visit, but we only spent a couple of hours there, so best to include with one of the other activities in the area.