Listen to Sleepy Time (Natural Sound) online. Sleepy Time (Natural Sound) is an English language song and is sung by Positive Thinking. Sleepy Time (Natural Sound), from the album Ame Se - Música Suave New Age Relaxante para Treinar A Concentração Bom Sono Paz Mental com Sons da Natureza Instrumentais Binaurais, was released in the year 2017. The duration of the song is 5:19. Download English songs online from JioSaavn.