Just say, “Open CBeebies and play the calming sounds of… waves / birdsong / rain / car journey / spaceship / white noise / pink noise / brown noise.” ...

The gentle trickle of water can mask unwanted noise and promote relaxation ... Hang them in areas with natural breezes for a continuous, calming effect. Encouraging birds to visit your garden ...

Sounds do have the ability to calm us down ... when planning urban areas - water fountains are often strategically places to minimise the disruption of noise from traffic, for example.