Planning my trip with a 8- and 5-year-old, I definitely want to spend a day in a science museum (I have fond memories of the London Science Museum - which seemed infinite to me as a child). I've heard of 'La Villette', and started looking up information, but I have discovered that there are two associated museums: the Cité des sciences and the Palais de la découverte.
From their (associated) websites, I'm having difficulty finding differentiators to help me work out exactly which might best suit the family, or even working out if there is a real difference.
I know that I could spend hours trawling through the websites trying to get to the heart of the matter, but I'd prefer to read the experience of someone who's been to both (or at least knows what they're talking about) and can give me a considered opinion.
UPDATE - just got back from the Cité des enfants 5-12 ans, which was great except for one BIG downside which really threw/annoyed me: they kick you out after 1 1/2 hours, whether you've finished or not. So I ended up paying twice, and waiting to get back in again.