Fè rechèch pou: Tit Otè Sijè Seri ki kòmanse ak: 10 20 30 50 100 pou chak paj < 10 ribrik presedan yo 10 pwochen ribrik yo > Navige nan ribrik yo # How it happened 1 How it happened (Union Square Kids (Firm)) 1 How it works 5 How it's made 1 How machines work 4 How Many Sleeps 'Til 1 How nature works 3 How people lived 4 How the world makes music 4 How the world worships 4 10 20 30 50 100 pou chak paj < 10 ribrik presedan yo 10 pwochen ribrik yo >