For young people, you can start maybe with some tv show in french with subtitles : it will help them to be use to the language.
A advice that I give to my student, is to write a diary : every evening, write 3-5 sentences about your days in French. Like that you will learn the basic vocabulary arround your life quickly.
There is different possibility for learn :
- the kid already know some french : so he has to practice the speaking with a teacher. The teacher have to teach him new stuff and correct him during the class, and also give exercices.
- if the kid know nothing, you have many possibilities :
- learn the basic with a teacher
- follow a book
- practice on internet with website like babel, duolingo, etc
For young people, you have to find a funny way to learn, it is working with a teacher (if the kid feel good with) or by the website (it is more dynamic).
I hope it will help you. Ask me if you have any questions, I can give you some website, etc