Isabel had scrapped the old donkeys and engines. Isabel had scrapped the old donkeys and engines.

There are scraps of the crashed airplane. There are scraps of the crashed airplane.

...where? It sounds kind of weird to just say "there is/are X" without saying where, unless maybe it's an abstract thing (e.g. "There is an even prime number."). It would suffice to say "There are scrapes of the crashed plane on the ground / all over the ground."

The impractical law has been scrapped. The impractical law has been scrapped.

I am dreadfully happy and appalling excited:) I am dreadfully happy and appalling excited:)

"Appalling" should be "appallingly" because it's used as an adverb here, not an adjective. Also, "appalling" (and, to a lesser extend, "dreadful") sound weird when applied to the words "happy" and "excited" because they generally have a negative connotation, especially the former. For instance: "This kitchen is appallingly dirty."

Little chaps. Little chaps.

This is not a full sentence. Also, note that "chap" is probably specific to UK English (in the US, you don't hear people calling boys "chaps").

He hovered before a stall inside the station. He hovered before a stall inside the station.

This sentence is unclear. What do you mean by "stall"? Like a restroom stall?

Somebody went sneakingsnuck up to the playground and yelled. Somebody snuck up to the playground and yelled.

Having lapped up of the cake, I felt totally satisfied. Having lapped up of the cake, I felt totally satisfied.

I have never heard this phrase. As far as I'm aware, "to lap up" can refer to drinking (but not eating) and it also has some figurative meanings, but this phrase does not use the word "of". You would also use it to describe an animal eating or drinking using their tongue, e.g. "When I drop food on the floor, I don't have to clean it up because my dog laps it right up."