Answer:
What word has kst in the middle, in the beginning, and at the end?
I am the hole in the night, the ever watchful eye. I return in a cycle, to enlighten the sky.
In Paris but not in France, the thinnest of its siblings.
What does a WW1 Trench, A Submarine and a Popular Phone App all have in common?
I'm the source of all emotion, but I'm caged in a white prison.
What did the piece of wood say when he saw the screwdriver and screws approaching?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?