Not working with kids, but started playing the game today and thought since no one answered you yet, I give it a try. Basically what you see above in the core premise is a sneak peak of the prompts you get for writing. I guess if your kids are supposed to have prompts like death, guilt, honor and shall write about a burden of a fictional character I guess this should be fine.
However there are no safety techniques described in the document. I guess this is something you might want to bear in mind as a player to take care for yourself and I would not expect every game to have this, just something to keep in mind if your stories are on the heavier part on carrying a burden. Not sure about the age of the kids mentioned.
Lengthwise this is one of the longer games that I started to play (have not played that many solo games so far). If you look below on the other comment mentioning the segments it seems you have about 20 narrations to write so to say.