The curfew was introduced after teens behaved badly and caused trouble during half-term in February.
They were responsible for 27 crimes or incidents, police said.
Newsround website readers reacted strongly to the curfew idea. Many e-mailed the website to say what an unfair scheme it was, especially since it was the holidays.
Under new laws introduced in January, police are allowed to break up groups and to take kids home after 9pm if they're not with an adult.