The 7th mayor took the box too his house and smashed a hammer on it.He did this because he has a sickness and he thinks the cure is inside.The hammer only leaves a dent in the top of the box but it doesn't open.This scene is important because if the 7th mayor didn't take the box too his house and smashes a hammer on it, it would not have gotten lost, and he could tell his successor about the box and where it is.
On Night Street
Here are your crayons
Lina and Doon are assigned their jobs.Lina gets pipeworks and Doon gets mesenger.Doon didn't like his job so he throws a hissy fit.In the end Doon and Lina trade jobs.This scene is important because if Lina and Doon didn't trade jobs Doon would not be able to try and save Ember by trying to fix the generator.Lina would not be able to help Doon save Ember!
We did it together!!!
Lina goes to the store to buy a new coat for gamy.Instead she buys 2 crayons that were very expensive.Later Lina loses Poppy and a black out happens and it is 7 minutes long.This was the longest blackout.This scene is important because the blackout causes the citizens to get anxious about the city and what might happen.
I predict that at the end Doon and Lina find Sadge and get the key and open the exit door to the real world!