A six-year-old boy called Ryan, who reviews toys on YouTube will start selling his own brand of toys on Walmart’s 2,500 US stores and website from Monday.

Christened ‘Ryan’s World’, the range of toys will expand to other retailers in October. Reviewing toys on YouTube has made the six-year-old a millionaire, having earned $11 million from the activity last year.

The star of the YouTube channel Ryan ToysReview, known simply as Ryan, his last name and location are held secret, was the 8th best paid YouTuber last year and has over 15 million subscribers.