For more than 30 years the Biff, Chip and Kipper books have been used in primary schools to teach children how to read. Now their antics are being played out on the small screen with a new CBeebies series, Biff and Chip.
The BBC visited the Warrington set of the show.
Video journalist: Alex Stanger
This article was originally published by Bbc.co.uk. Read the original article here.