Yes for the bolded question (and adults too xD), there's even a video from Mika's old blog where he gets a tofu doll + house by a fan and plays with it, and actually they're called To-Fu Dolls
I see normally, but I was referring to the pics from Les coachs reprennent "Come Together" pour le lancement des Battles and EXCLU: Julien Doré, coach de luxe pour Law et Quentin Bruno