In episode 3, Dannan caught up with X-Factor vocal superstars, G4, for an informal chat about one of their favourite electronic gizmos, the laptop computer.
Here some fun facts he learned along the way:
1. G4 use the built-in camera function on their laptop and store all their music.
2. Jon Ansell from G4 got his first laptop from the British government because he had dyslexia - which he says 'nearly made him cool'
3. The big breakthrough in laptop design came when scientists started putting the keyboard nearer to the screen and the battery closer to the user. It balanced the computer better and was easier to type on.
4. Another design breakthrough happened when engineers were able to reduce the heat generated by the computer components and so were able to shrink everything down into a laptop