Eureka, comment monter les jambes d'un pantalon !

Enfin je l'ai l'explication pour comprendre comment monter un pantalon sans se planter  ! (but in English)

THANK YOU HANDYPROJECTS & ROOKIEMOMS

http://handyprojects.blogspot.com/2005/04/how-to-make-easy-kids-pants.html

When the crotch sections are sewn together it should look like this.

turn it over to look like this. Sew the inside legs together starting at the crotch and sewing down the legs.

http://www.rookiemoms.com/make-some-easy-kids-pants/

5. You have two pant legs now, right?

6. Place right sides facing each other and pin. Sew along curves.

7. Reorient the pants and you’ll see that you just have a crotch to sew up and a waist to fold over and sew. Leave a space to thread the elastic through.