Hearing birds chirping in the morning can make you feel happy for up to eight hours. This is the conclusion drawn from a study by scientists at King's College London in the UK. Perhaps the sound of marbles and water will soothe your heart and make you happy. The sound of the marble run becomes ASMR and it's amazing.
This study surveyed people around the world and found a link between listening to bird songs and positive mood.
Researchers also suggest using bird songs as a psychotherapy.

Calming music for the nerves Soothing music for the heart and blood vessels, relaxation, music for the soul
Music for relaxation, meditation, studying, reading, massage, spa and sleep. This music is ideal for dealing with anxiety, stress, or insomnia, as it promotes relaxation and helps get rid of bad vibes. You can also use this music as a background for meditation or relaxing while sleeping.