"And they [Smallfilms] had a superb ear for creating sound effects that children could easily mimic the moment the programme had finished: just think about the swanny-whistle voices of the Clangers, the beatbox rhythm of Ivor's engine, or the marvellous carousel of just bloody lovely sounds that made up most of Bagpuss […] These are the sounds I hear in my own head when I remember my own childhood, and Oliver Postgate put them there."