The Harlem Globetrotters bring their world-famous basketball skills to the studio. There is an amazing performance, and the presenters have a go too. How to Train Your Dragon author, Cressida Cowell is live in studio to chat about the Little Picture Challenge and the Dragons finale on CBBC. Also, Barney takes on a 10K running challenge with sports therapist Amy Hughes, who ran a 53 different marathons in 53 days.