It really depends but generally speaking just because of the mechanics of it voice-over is easier because there is no hair no makeup no wardrobe no fittings no line memorizing. You don't have to me woken up in Russia at 6 in the morning and go film a scene. It's just easier on the body the family life to do voice-overs.

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A lot of children like I did move away from words because of the fear - which is something you have to take out of education: the fear of worrying about what marks you'll get detention worrying about letting people down your parents teachers.