The Dragon in the Castles

Mae Gwen a Gruff yn wynebu ymgyrch heriol! Maen nhw'n ymweld ag ugain o gestyll ledled Cymru. Yn gydymaith iddynt mae hen faner eu Mam-gu - Draig Goch sy'n golygu llawer iddi.
Gwen and Gruff are on a mission! They are visiting twenty castles around Wales. On their journey, their companion is an old Welsh Dragon which has a special place in their grandmother's heart.