Something that finally came. Write both the wait and the arrival.
What did you wait a long time for? How did it feel when it came?
Everyone gets the same subject. What differs is the follow-up: one question for children, two for teens, three for adults. Only the children's wording is simplified.
Write as if no one will read it. You can choose what to show after you finish.
Write down one thing that happened recently. It does not have to be a good story.
Explaining is what stalls you. Put down what you saw and what you heard instead.
Set the title first and the piece stops wandering.
The last line is the one that stays.
One long sentence can sink the whole piece.