The BBC has published its review of children's services at the corporation, revealing how viewing trends amongst youngsters is changing. It says children want more content online so they can access it from their mobile phones and tables. Steve Hewlett speaks to Helen Bullough, head of in-house production for CBBC about the challenges posed by creating apps and on-demand content for children. Also joining him is Greg Childs, who launched the first internet services for Children's BBC and is now Director of the Children's Media Foundation, and asks him why he thinks the BBC needs to do more to move children's entertainment from TV to online. A new season on Channel 4 starts next week which claims to examine how pornograph is affecting people's lives. One show, Sex Box, will feature couples having sex in a solid, sound-proofed box and then discussing their experience with a panel of experts. We talk to host Mariella Frostrup about why she decided to get involved, and what can be gained from a programme like this. And Ralph Lee, head of factual programmes at the channel, discusses whether programming like this fulfills a public service remit, or is simply a gimmick to attract a dwindling youth audience. The Radio Times celebrates its 90th birthday this week. Launched in a fit of pique in 1923, after an announcement from the Newpaper Proprietors' Association that it would be charging the BBC for publishing radio listings, it's since become one of the best known magazines of its kind. Steve Hewlett talks to its editor Ben Preston about how it's keeping pace by providing online guides, and keeping circulation going by brokering exclusives with big names like Naomi Campbell and Jamie Oliver. Producer: Katy Takatsuki