How do you say bobble head in french?

There isn't a direct translation for "bobblehead" in French. You can use a descriptive phrase like:

* Tête à ressort (literally "spring head")

* Figurine à tête mobile (figurine with a movable head)

* Tête de poupée qui bouge (doll head that moves)

You could also use the English term "bobblehead" if you are talking to someone who understands English.