Okay kiddo, so there was this really cool festival called Festival Rock y Ruedas de Avándaro that happened a long time ago in Mexico. It was all about music and having fun with a bunch of people who love the same things as you do!
Lots of famous musicians came to play at this festival, like El Tri and Jorge Santana, and they all played really loud and fun music that people loved to dance to. There were also motorcycles and cars doing cool tricks and things, which is why it was called "ruedas" (wheels).
The festival was so popular that lots and lots of people wanted to go, but there wasn't enough space for everyone. People ended up camping out in the woods around the festival, which was kind of like having a big sleepover with a bunch of friends!
But, even though lots of people were having a great time, some grown-ups started to worry that things were getting a little out of control. There were too many people and not enough food and water for everyone, and things started to get a little bit crazy.
Eventually, the festival had to end early because the grown-ups were afraid that something bad might happen. But even though it didn't last very long, Festival Rock y Ruedas de Avándaro is still remembered as a really fun and exciting time in Mexico's history, where people could come together through the power of music and having fun with their friends.