Billy's party

Today is Billy's birthday. He's having a fancy-dress party. 
All of his friends are coming: Jean-Claude the worm, of course, and Josette the mouse, the bison, the goat...
Recently, Jean-Claude has a little brother, and that little worm sometimes gets lost.
But don't worry, the party is going to be a huge success!

Age 4 and up

2014 ed. l’Ecole des Loisirs, Paris
Also written in Dutch. Gottmer Uitgeverij
Translated in German by Moritz Verlag (Julia Suessbrich), and in Iatalian by Babalibri.
Also translated in Japanese and Chinese 
Watch this funny cartoon video! 

A very nice review (in French): 
And one in German: