This is located across the road from the farm that was inundated with ash when the volcano erupted in 2010, and the farm owners opened this small attraction. For 750 ISK, you get to see a 20-minute film about the eruption and how it affected the farm and general area. The film was informative and provided an insider's view of the event. However, that's pretty much it. The only other part of the attraction is a gift shop.
It was a little disappointing, especially having been to the Mount St. Helen's Visitor Center in Washington State. But Eyjafjallajokull was a totally different type of volcano and did not have the same destructive force as Mt. St. Helen's.