Blwyddyn 5 yn Amgueddfa’r Big Pit / Year 5 at the Big Pit Museum 14.05.2018Mae Blwyddyn 5 wedi goroesi’r Big Pit a rwan dim ond 10 milltir o’r gwersyll ym Mae Caerdydd.Year 5 have survived the Big Pit and are only 10 miles from their accommodation in Cardiff Bay.