CD-Audio: Most physical copies of the "Livre de l'élève" (Student Book) or the "Cahier d'activités" (Activity Book) come with a CD or a digital access code.
This is advanced for kids, but it works wonders. Play a short dialogue (e.g., "Bonjour, je m'appelle Alex.") and have the child try to speak at the same time as the audio. This forces the brain to work at native speed.
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