A possible concise summary is:
Junior shows his friends his new toy helicopter, but Cody accidentally crashes it into the ceiling fan. Junior gets mad at Cody and they stop being friends. They have to work together on a solar system project, but they disagree on how to do it. Junior destroys Cody's project with a mallet and they both fail. Cody's mom comes to Junior's house and makes them apologize to each other. They reluctantly become friends again.
This is a challenging task, but I'll try my best. Here are some possible facts extracted from the text:
1. Junior has a remote-control helicopter that his dad bought him.
2. Cody accidentally crashes the helicopter into the ceiling fan and breaks it.
3. Junior and Cody get into an argument and stop being friends over the incident.
4. The teacher assigns a solar system project that is worth 50% of the grade.
5. Junior and Cody are forced to work together on the project, but they disagree on how to do it.
6. Junior and Joseph make a project using sports equipment and M&Ms, while Cody makes a project using foam balls and facts.
7. Junior destroys Cody's project with a mallet and tries to blame it on someone else.
8. Cody's mom confronts Junior's dad about the situation and makes them apologize to each other.
9. Junior and Cody reluctantly become friends again.