Bestselling Diary Of A Wimpy Kid creator Jeff Kinney has warned that children are not being “fully socialised” because of their changing relationship with technology.

The writer has sold over 150 million print copies of his Wimpy Kid series, with the books being adapted into movies for the big-screen.

But the US author said that screen time posed a problem for authors wanting to set their books in the real world.

And he described children’s relationships with technology as the “great experiment of our times”.

Jeff Kinney and the wimpy kid.Jeff Kinney and the wimpy kid (Greg Heffley design/Wimpy Kid, Inc/PA)

“I don’t know if anybody really has the right answer but what’s undeniable is the way that kids communicate with each other has changed fundamentally and probably permanently,” he told the Press Association.

“What we really want for our kids is to be fully socialised and to hold a conversation with one another and I think that’s what’s being lost.

“If I get in the car with my kids now everybody’s on their phone … and it feels weird to drive around with everybody on their phone.

“I think it is being lost, not just slightly, and I think that we’re all complicit as parents as well. It’s on my mind all the time.”

Kinney, whose books have been translated into more than 50 languages, added: “Screen time is the issue that every parent is facing these days.”

Kinney focuses his writing on childhood.Kinney focuses his writing on childhood (Greg Heffley design/Wimpy Kid, Inc/PA)

The US author, who created Poptropica, a virtual world website for kids featuring games and stories, has been penning the Wimpy Kid series for 10 years.

“During the time I have been writing books, kids’ relationships with their electronic devices have changed dramatically,” he said.

“It gets harder to write about childhood without mentioning phones and texting.”

Kinney, who came up with his bestselling stories, about school pupil “weakling” Greg Heffley, after failing to make it as a newspaper cartoonist, added of his protagonist: “It’s a little bit harder for me to have him in the real world but to ignore this major component of childhood.”

Kinney's series has become a hit with young readers.Kinney’s series has become a hit with young readers (Greg Heffley design/Wimpy Kid, Inc/PA)

The author has penned his 12th book in the series, Diary Of A Wimpy Kid: The Getaway, about a “holiday nightmare”.

He said that he sees life in the character in his books, which combine comic strip with the written word, for several more years yet.

“It’s a big decision to terminate a cartoon character because it leaves a big hole in people’s lives,” Kinney said.

“I’m definitely going to keep writing about this character for hopefully the next 10 years.”

Diary Of A Wimpy Kid: The Getaway by Jeff Kinney is out now, published by Puffin, £12.99