Thirty local kids completed a youth marathon Sunday, some at the finish line of the Madison Marathon. Cumulatively, in the last four to 10 months, they completed 26 miles of running, read 26 books and did 26 random acts of kindness. The idea was the brainchild of UW-Madison medical school student Katelin Krystowiak. She started the ?Ready, Set, Go! Youth Marathon? this year, modeled after a similar program in St. Louis. Kids from kindergarten through eighth grade were invited to take part.