Students show the crane mobile hanging in the center area during CLB. The mobile, containing a 24 origami paper cranes suspended from an ultralight plane, was a project put together by students who are reading the nonfiction book Whoop Dreams by Jane Duden. Learning about reintroduction of whooping crane migration to the eastern part of the country, each student is tracking a particular crane as it reaches its winter home in Florida and then returns to Wisconsin's Necedah Wildlife Refuge in the spring. The cranes are scheduled to fly through through Tennessee, making stops in Carol and Hardin Counties toward the end of this month, and anyone can follow their progress on the Operation Migration or Journey North websites.