Perhaps the main idea is centered around the boy's experience of being called 'it' and how he copes with it. It might show his resilience in the face of this dehumanizing form of address, and his attempts to break free from the limitations it imposes on him.
The core of the story is about trust and honesty. The boy loses people's trust by constantly crying wolf falsely. Eventually, when it's for real, no one comes to his aid. It shows how our actions can have long-term effects.
Since I don't know the exact 'the girl boy story', I can't say for sure. But generally, it might be about the relationship between a girl and a boy.
As I don't know the exact'memory boy story', it could be about the power of memory in general. Maybe the main idea is how the boy's memory shapes his identity, experiences and relationships.
The main idea might be centered around the relationship between the boy and the train. It could be that the train represents freedom or a new opportunity for the boy. He could be trying to reach a destination on the train, or it might be a story about how the train impacts his life in some way. For example, he might meet interesting people on the train or have a self - discovery during the train journey.
As I don't know the story, it could be about the boy's pursuit of a dream related to wearing a leotard. Maybe he wants to be a great dancer or athlete and the leotard is part of his journey.
The main idea might be about the encounter and relationship between a boy and a king. Maybe it shows how their lives intersect, and they learn from each other.
As I don't know the specific 'Popsicle Boy Story', it's hard to say the main idea. But it might be about the boy's relationship with popsicles, like his love for them.
The main idea is often about a boy and his relationship with a cricket. Maybe it's about how the cricket brings some special experiences or lessons to the boy.
As I don't know the specific 'the boy' story, I can't determine the main idea. It could be about the boy's self - discovery, his relationship with others, or his pursuit of a dream.
The main idea could be the bond between the boy and the boat. It might tell a story of how the boy came across the boat, whether it was by chance or inheritance. Then it could show how their relationship evolves as he uses the boat for different purposes, like exploring the nearby islands or just floating on the lake for fun.