Surfing the net is taking over from more traditional after-school activities, according to a survey of more than 400,000 children.
Half of the kids said they had used a computer - for browsing the web or playing games - the night before they were quizzed for the survey.
But, despite the success of Harry Potter and other book characters, reading is becoming less popular.
There has been a 20% drop in some girls' reading habits since the 1990s.
Around 15 years ago, 45% of 12 to 13-year-old girls regularly picked up a book, but this plummeted to 20% in the latest survey.
It also showed that doing sport after school is more popular with younger lads, with 60% of 10 and 11-year-old boys into the activity, compared to just 25% of 12 to 15-year-old girls.
But some things don't turn around too much.
The survey showed little change in the amount of kids playing a musical instrument, seeing friends and watching TV.