Okay kiddo, let me try to explain the q+/papias hypothesis in a way that you can understand.
Have you ever played a game where you pass around a message and it changes a little bit each time? It's like that with the stories in the Bible. People told and retold stories about Jesus and his teachings, and sometimes the stories changed or got mixed up.
Now, the q+/papias hypothesis is a way some people try to understand where these changes in the stories came from. They think there may have been a written source that some of the people telling the stories used as a reference. This source is called the "Q" source.
The q+/papias hypothesis also suggests that there was another source called the "papias" source that some people used to tell their stories about Jesus.
So, basically, this hypothesis is saying that there were written sources that people used to tell stories about Jesus, and that's why sometimes the stories are different. Does that make sense, kiddo?