The earliest surviving yo-yo dates to 500 BC and was made using terra cotta (clay) disks. A Greek vase painting from this date shows a boy playing yo-yo(see right). Greek records from this time describe toys made out of wood, metal, or painted terra cotta. The terra cotta disks were used to ceremonially offer the toys of youth to certain gods when a child came of age. Disks of other materials were used for actual play. 