1. I am round, about 10 centimetres long and 5cm in diameter.
2. I sprang from Thomas Edison's invention of the telephone and the telegraph.
3. I have recorded sound but another machine is needed if you want to hear me.
4. I will play you "Smiles, Then Kisses" by the Waikiki Hawaiian Orchestra.
5. A CD will do the same job today.

Find out the answer next week...