I designed this piece of "electronic jewellery" called the Jazzy Heart (click on Play). The Australian publishers Silicon Chip commented: "The Jazzy Heart really is jazzy. It needs to be seen to be appreciated -- preferably accompanied with a fast disco beat." OBSERVATION: In 2004, the Jazzy Heart became the Jazzy Necklace, which publishers Wimborne, in an editorial, predicted would go into production. It did, in modified versions of many kinds. The attraction of the design was its simplicity, using off-the-shelf components.