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Ble mae'r Mynydd Uchaf?
'Ble mae'r mynydd uchaf?' Mae Tad-cu'n adrodd stori am Goronwy Gwych, Planed Craig Fach a Chystadleuaeth Adeiladu Mynydd Rhyng-Galactig! Today, Hari asks where is the highest mountain?
Ar y Teledu
Dydd Mawrth
06:15