When we were kids, a discarded cardboard box was all we needed for our little imaginations to run wild. While sat inside a cardboard box, you’d suddenly be sat inside a car or a spaceship. Well, this weekend, Kevin McCloud has made our childish dreams a reality by creating a fully-functional cardboard boat. On Saturday morning, McCloud sailed this vessel down the Thames as he made his way to the Grand Designs Live show held at London’s Excel.