Well can't compare Cars to Ratatouille for you until it arrives(went ahead and ordered it), but I can say that I've got Meet the Robinsons, and it's more childish that Ratatouille. Meet the Robinsons is enjoyable, no argument, but Ratatouille is just something with more jokes that'll make adults laugh and no things so stupid it'll make adults want to look away. (I found a lot of quirks in Meet the Robinsons that annoyed me, mostly with the family.) By contrast there's no silly bullshit in Ratatouille, like people wearing their clothing backwards and drawing a face on the back of their head, or dancing frogs. You can think of its attitude being more on the level of something like Aladdin or the Lion King, where children can certainly watch and enjoy it but it wasn't designed purely for them.
I might say something like the Robinsons and possible Cars(can't say til I see it), is rather designed specifically for children but it's high quality enough, interesting enough and has a good enough of a message for adults to like too.
I might say something like the Robinsons and possible Cars(can't say til I see it), is rather designed specifically for children but it's high quality enough, interesting enough and has a good enough of a message for adults to like too.