Getting arrested by the police is a big deal. For an adult it can mean getting a fine, going to court and even being sent to prison.
But it's not just grown-ups who are getting in trouble with the law.
Last year more than 2000 primary schools kids were arrested across England and Wales - that's about six every day.
However, the total number of children arrested by the police has fallen.
Watch Hayley's report to find out more.