Nanny McPhee's suggestions to the guard about how to eat broccoli, to some people, would be considered to be very good ideas for a vegetable which can be very difficult to get people to eat (try it with cheese, and in some seasons, asparagus can be a pleasant alternative).
A bit of a dark one, but why would the bomb in the second film, a bomb that was likely designed to be dropped from a plane, have a timer on it? Putting aside the fear factor of having a TimeBomb in your backyard, many bombs are required by law to have some means of rendering themselves safe, preventing accidental detonation years later. The bomb in the film was likely designed that way so that the secondary timer would set it off if the primary detonator failed, which would be perfect if it landed in an enemy base and not a civilian farm.
Re: the bomb example above. Another interpretation of the bomb's design is that the timer was the primary trigger, meaning that it would land intact (likely with an armored cone similar to a bunker-buster), then just sit there for a few minutes while those within range scramble to call the bomb techs. And depending on how long it takes for them to actually get there, it may've gone off while they were disarming it, reducing the number of techs available for the next bomb.
Also, Aggie being implied to be the same person as the old woman implies that Mr. Brown and Evangeline are dead.
Probably her siblings, too, since only she makes an appearance and we don't hear about her siblings.
In the sequel, the two boys headed to the War office in the capital to ensure they had proof that the Disappeared Dad was still alive... yet they hear the news and immediately leave empty-handed? At least grab the ticker tape from the operator first...
