Lars and the reindeer

"The short North Pole summer is ending, and the reindeer are starting their winter migration. But this year, man has interfered with their journey. A high fence that goes on for miles is right in their path, and piles of giant pipes litter the landscape. The herd is trapped. If they don't get through, they will perish. Lars has an idea, but will it work?"--Page 4 of cover.