Preschool series. Four colourful creatures with televisions on their bellies live and play together in Teletubbyland.
Episode 27: Lullaby
During Tiddlytubbies' Sleepybyes, RuRu is wide awake. Tinky Winky, Dipsy, Laa-Laa and Po take it in turns to sing him a lullaby. When the Teletubbies sing the lullaby together, it soon sends RuRu off to sleep.