The PBS KIDS Roku channel provides a mix of videos and full-length episodes of 29 children's PBS programs. Many series, such as Clifford the Big Red Dog, offer only sets of clips. In this case, four videos of 11 to 20 clips each, each 30 to 40 minutes in length. Other show s-Cat in the Hat, for example-have both complete and video sets. pbs.org/activate in the space for the URL. In the textbox given, type your seven-digit activation code