This is a wonderful place to learn about how Dublin started out as a Viking settlement and tells you about its history up until the Medieval period. It is good if you've family or friends with different languages a they had translations at the desk.
For teachers, they offer a tour to kids with a guide dressed up in re-enactment costume to give them an added feature to the tour. They also have public tours during the day, otherwise it is self guided.
I would recommend to take your time around it and really read everything otherwise you won't learn anything. It should take an hour and you can get a dual ticket to visit the adjoining Christchurch Cathedral which you can enter through the bridge that joins the two buildings.
It is near Guinness Storehouse, across the river from St. Michans Church and not too far from Kilmainham Gaol and Dublin Zoo if you wanted to make a day out of it.
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