Richard and his friends look at rainbows and visit.
Sally Gray helps Voyager to understand how people on Earth travel from place to place.
The interactive internet club for kids, live from the BBC Cybercafe.
Interactive show presented by Jason Bradbury.
Rory McGrath and his team explore the possible connections between the city of Bath's design and Druid beliefs.
John Emsley demonstrates how to extract iron from breakfast cereal.
Sally Gray shows the sights of Berlin to a mystery ViP.