Ignore Monk's bizarre review, the film couldn't be less exploitative.
It's an unusual story which examines unsentimentally, humourously, and without judgement, the effects of idealistic adults' political beliefs on their children. It contrasts the safe, conservative, bourgeois milieu in which the children have grown up, with the unorthodox, unpredictable world they find themselves drawn into by their parents' new political affiliations.
The film makes clever use of a child's perspective to point up absurdities in adult behaviour. Similar then in theme to 'What Maisie Knew' by Henry James & the novel 'Love Child' by Allegra Huston.
It benefits from marvelously understated performances - particularly Anna, whose miraculously unaffected turn puts winsome, practiced-cute American child stars to shame. There's some influence from Eric Rohmer in the film's throwaway ease, its engagement with ideas, & moments of comedy.
In summary - a thoughtful & charming film.