Live entertainment with music, competitions and guests including actress Melissa Joan Hart, who crosses the Atlantic to talk about her role in the teen soap "Clarissa Explains It All".

Ric Blaxill, producer of BBCtv's "Top of the Pops" will be taking calls, and Dr Aric Sigman offers more advice on dealing with problems of growing up. There's cartoon action with "Rugrats" and "X-Men", and Trev Neal and Simon Hickson visit the Dry Cleaners. Presented by Andi Peters and Emma Forbes.

Live entertainment with music, competitions and guests, including Jonathan Ross with news of last night's Comic Relief events. Today sees the start of Science Week, and Zoe Ball and Carol Vorderman visit the Science Museum to preview some of the special events.

There's cartoon action with Rugrats and X-Men, the teen soap opera Clarissa Explains It All, Trev Neal and Simon Hickson go Bonkers, and the Leprechauns try to work their magic. Presented by Andi Peters and Emma Forbes.