What the group has come up with is a life-size replica of a Guantanamo prison cell. The cell measures 10 by 6 feet and is 8 feet high and is all but barren walls.

Amnesty began a tour in May with a stop in Miami and will stop in Los Angeles and St. Louis later this year.

But before then the cell will be put on display at the Democratic National Convention in Denver, beginning Aug. 26, and the Republican event in early September.

The idea is to give convention-goers an up-close look at the cell and a chance to imagine living in one for months or years on end, without benefit of trial.

The display has two aims, to get people talking and to get them to act, says Njambi Good, director of the “Counter Terror with Justice” campaign at Amnesty International.

“It’s an interactive device that begins a conversation,” Good says. “Most people have familiarity with the issue but don’t really know a lot about it. Many times the ones who go inside the cell have an experience that converts them.”

Good estimates about 60 to 70 percent of those who have entered the cell thus far have immediately taken an action, such as signing a petition.