S4C

Blero'n Mynd i Ocido - Cyfres 1: Blero'n Colli Balwn

Mae Blero wrth ei fodd efo balwns o bob lliw a llun, ac mae o am gael gwybod pam eu bod yn hedfan ymhell, bell i'r awyr. Blero wants to know what makes balloons float up high in...听

  • Duration11 mins
  • First shown12 Sep 2016
  • Available for 26 days
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