"Fais dodo" is baby talk for "go to sleep" and "Colas" is short for "Nicolas" in French.

Fais dodo, Colas mon p'tit frère - French Children's Songs - France - Mama Lisa's World: Children's Songs and Rhymes from Around the World  - Intro Image

Notes

Regarding the line about chocolate in the song, "Qui fait du chocolat" - I asked Monique in France if it was referring to actual chocolate or hot chocolate. She wrote, "I never thought about it before, but unless the dad is a pastry/chocolate maker, yes, he's making hot chocolate."

Fais dodo, Colas mon p'tit frère - French Children's Songs - France - Mama Lisa's World: Children's Songs and Rhymes from Around the World  - Comment After Song Image
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Many thanks to Tiphaine Woerth for recording this song for Mama Lisa's World.

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Many thanks to Pascal from Frenchy Bunny for sharing his recording with us.

Below is an instrumental version of "Fais dodo"...

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Many thanks to Pascal from Frenchy Bunny for sharing the instrumental verison of "Fais dodo".

Sheet Music

Sheet Music - Fais dodo, Colas mon p'tit frère

Thanks and Acknowledgements

Many thanks to Frédérique Gearing for contributing this rhyme.

Illustration by Louis-Maurice Boutet de Monvel (1851-1913) from Vieilles Chansons pour les Petits Enfants: Avec Accompagnements / de Ch. M. Widor (1844 - 1937); Illustrations Par M.B. de Monvel. Paris: E. Plon, Nourrit et Cie, [1883]. The 2nd illustration is from Chansons et rondes enfantines (1871). The images were graphically edited by Lisa Yannucci.

More info about this song:

1. "Les plus belles chansons", Hachette 1995: "...the tune probably goes back to the 18th century, the lyrics are traditional."
2. "Diapason turquoise", vol.1, Les presses de l'Ile de France, 2001, "Traditional lyrics on a 18th century tune."
Appears in Chansons et rondes enfantines: avec notices et accompagnement de piano (1870); Weckerlin, J.-B (Jean-Baptiste), 1821-1910; Garnier frères, publisher.

Merci beaucoup!