The Omaha Children’s Museum is hitting the road. For the first time, the museum has created a traveling exhibit that will appear in select cities throughout the nation. “Forever Forest” opens a six-month run on Saturday in Omaha, and then it will spend the next decade visiting children’s museums and other venues across the country. The exhibit is all about trees, from the forest to your home. It’s designed to help kids learn about where wood comes from, how it’s processed and transported and all the ways it can be used. About three years ago, Chief Museum Officer Jeff Barnhart was approached by the National Hardwood Lumber Association with the idea. …If the museum finds enough venues to rent it, he estimated that “Forever Forest” could reach millions of children across the country during a 10-year run.