Parents in Germany are being urged to destroy their children's smart-watches, due to poor security.
The Federal Network Agency has banned the sale of the watches after it was realised that there was an opportunity for privacy invasion, reported BBC.
"Via an app, parents can use such children's watches to listen unnoticed to the child's environment and they are to be regarded as an unauthorised transmitting system," Federal Network Agency president Jochen Homann told the BBC.
The security defects in the watches, which are often bought for children aged 5-12 years, could have allowed hackers track the children and manipulate the appearance of the child's whereabouts.
Manufacturers of the smart-watches say that the security issues have been resolved.