I share your pain and I really hope Islamic Iran releases your kids and all other prisoners asap but it appears Iran wants to exchange them but I suspect Islamic Iran favours a visit from a high profile US official to secure release of the hikers, like the case of Bill Clinton visit to North Korea and meeting with North Korean leader.
On the right side of photo the placard reads "Shame on you Iran". I wish someone would have wrote "Islamic Iran" instead Iran. Also I know it doesn't make any difference for an American but it makes different for an Iranian.
Update: Iran wants to exchange American hikers with 11 imprisoned Iranians in the USA. In a website called BarackObama.ir asks "Will Obama make three American mothers happy by releasing 11 Iranian prisoners?"
Iran didn't take three hikers to court since they have been arrested so definitely they are trying to pursue American government to take one step towards Iran and meets Iranian government demands.
I covered the news of three american mothers visited hikers in Iran in two posts:
1. The mothers of three American hikers jailed in Iran
2. Islamic republic of double standard
Photo courtesy of daylife