Author: Chris S. Stephens; Welsh Adaptation: Helen Emanuel Davies.

A story about Siôn, his dad and a crisis at the school's jubilee concert. Can Siôn's golden jumper save the day? It's the school's 50th anniversary and Siôn is looking forward to taking part in their jubilee concert.

Awdur: Chris S. Stephens; Addasiad Cymraeg: Helen Emanuel Davies.

Stori am Siôn, ei dad, a chythrwfl sy'n digwydd yn nghyngerdd jiwbili yr ysgol. Mae yna ddathliadau mawr ar droed wrth i'r ysgol ddathlu ei phen-blwydd yn hanner can mlwydd oed. Tybed all siwmper arbennig Siôn achub y dydd?