A possible concise summary is:
Junior celebrates his 12th birthday with his friends and decides to change his candles to 21 so he can drink Sprite. He gets Chef Pee Pee arrested for offering them soda and coke, and then drives a Wall-E toy while drunk on Sprite. He gets caught by the same cop who arrested Chef Pee Pee and calls him for help. Chef Pee Pee explains that drinking soda is not illegal and that Junior did not really turn 21.
Here are the key facts from the text:
1. The speaker's name is Junior, and it's his birthday.
2. Junior is turning 12 years old.
3. Junior's friends, Joseph and Cody, are celebrating his birthday with him.
4. Joseph forgot to say "Happy Birthday" to Junior at first, but then said it after being reminded.
5. Junior wants to be 21 years old so he can drink liquids like Hawaiian Punch and Sprite.
6. Junior and his friends joke about changing the candles on his cake from 12 to 21 to make him older.
7. A police officer arrives at Junior's birthday party to arrest Chef Pee Pee for offering drinks to minors.
8. Chef Pee Pee is arrested and taken away.
9. Junior and his friends attend a meeting of Addictions Anonymous, where they meet various characters with different addictions.
10. Junior gets a Travis Scott meal with a Sprite, which he is excited to drink now that he thinks he's 21.
11. Junior gets into trouble with the police for driving while intoxicated after drinking the Sprite.
12. Junior is not actually 21 years old, but rather still 12 years old.
13. Junior's friends are still cool with him despite his earlier antics.