Bedtime story
From Tardis Wiki, the free Doctor Who reference
Bedtime stories were the stories which were traditionally read by parents to their children at bedtime, before they fell asleep. (TV: Forest of the Dead)
The Eleventh Doctor recalled that when he was eight years old, a thousand years prior, he loved "classic" bedtime stories such as The Three Little Sontarans, The Emperor Dalek's New Clothes and Snow White and the Seven Keys to Doomsday. (TV: Night Terrors)
In order to pass the time, while serving time in prison, the Thirteenth Doctor began telling herself a "classic" bedtime story involving "Mr and Mrs Dursley of 4 Privet Drive". (TV: Revolution of the Daleks )
