My husband and I took our kids the last time the ships were in Little Rock in November 2011. The guys in charge do a great job educating the kids, adults too, during the tours. Awesome way to step back in history and experience what life might have been like on the expeditions.
This would be an awesome field trip for homeschool groups!
Check their website for exact dates, times and more info @ http://www.thenina.com