What is free running? Where did it begin and how do you do it? Find out all about this fast-paced sport in an information book packed with exciting photographs and written by Andrew Fusek Peters. Collins Big Cat Progress books are specifically designed for children at Key Stage 2 who have a Key Stage 1 reading level, giving them age-appropriate texts that they can read, building their confidence and fostering positive attitudes towards reading. Text type: An information book Curriculum links: P. E.