A school is warning parents about the effect that they say video games can have on children.
Widden Primary in Gloucester has been telling parents that they have noticed behaviour changes in pupils who've been playing the popular online game Fortnite.
The game is one of the most popular in the world right now.
It's an online game where 100 people fight it out till the last one standing is the winner.
The game is popular, schools like Widden Primary have been inviting parents and their children in to remind them that this game, like others, can be extremely addictive and can have a negative effect on children's performance and behaviour.
Andy Robertson is a journalist currently writing a book about gaming and says simply banning children from playing video games is not the answer. It's about education.
Fortnite comes with a 12 rating, so children under that age should not be playing it.
We have contacted the makers of Fortnite, Epic Games, but they have so far not commented.