Mark Wright and Lauren Layfield face their biggest challenge yet - CBBC

Mark and Lauren prepare to crash a school assembly to surprise a group of children who'll soon have their very own community den.
For more fun, CBBC games and great makes visit www.bbc.co.uk/cbbc/
CBBC aims to encourage children to find out more about existing interests and inspire them to develop new ones; helps them understand the world around them and provides an entertaining watch when they just want to relax.
The majority of our output is UK-made, reflecting children's lives in the UK today. Popular programmes on CBBC include The Next Step, Wolfblood, Blue Peter, CBBC Official Chart Show, Hetty Feather, Horrible Histories, Newsround, Four O'Clock Club and The Dumping Ground. It's possible to catch up on CBBC shows on the CBBC iPlayer at www.bbc.co.uk/iplayer/cbbc