If the big kid in the story learns to be kind and helpful towards the crippled kid, the moral could be about compassion. That we should be empathetic towards those who are less fortunate or different from us.
If it's a story about the big kid helping the crippled kid, the moral could be about kindness and acceptance. We should be kind to those who are different from us.
Once upon a time, there was a kid named Tim in school. He was a bit different, wearing thick glasses and being really into books. Some of the popular kids in the class started to bully him. They would knock his books out of his hands in the hallway and call him names like 'nerd' and 'four - eyes'. Tim was really sad but he didn't tell anyone at first. One day, a new teacher noticed what was going on. She started to keep a closer eye on those bullies and also encouraged Tim to be proud of who he was. Eventually, with the teacher's help, the bullying stopped and Tim became more confident.
I'm not sure which specific 'big kid and crippled kid story' you are referring to. There could be many stories with such characters. It might be a story about how the big kid helps the crippled kid, or perhaps there are some conflicts and reconciliations between them.
I haven't heard of a particular 'big kid and crippled kid story' by that name. It could be a local or personal story. However, if it's a story about two kids where one is bigger and the other has some disability, it might be a story of friendship. The big kid could protect the crippled kid from bullies, or they could learn important life lessons from each other.