Technology and internet giants such as Google, Facebook and Apple will also face greater accountability under the laws - which require firms to report any data breaches likely to "risk the rights and freedoms of individuals" within 72 hours of first becoming aware of it.
Fanny Blankers-Koen, The Flying Housewife, Gets A Google Doodle
After suffering from Alzheimer's and deafness, Fanny died at age 85 in a Hoofddorp psychiatric nursing home on 25 January 2004. Her true accomplishment came in 1948, when she competed in the 1948 London Games despite being constantly harassed for her age.
The chief executive of Childnet International - a charity that is a member of Facebook's Safety Advisory Board - said he thought the firm had more work to do to communicate the change.
Such websites and apps are obliged to "make reasonable efforts to verify" that a parent or guardian has given consent for their child's data to be handled.
WhatsApp's minimum age of use will remain 13 years in the rest of the world, in line with its parent.
If a new European law restricting what companies can do with people's online data went into effect tomorrow, nearly 1.9 billion Facebook Inc. users around the world would be protected by it. "While many will have sought the necessary authorizations from European Union citizens to store their data and use it for marketing etc., they will lack the processes and protections demanded by the legislation to ensure compliance and protect personally identifiable information with which they have been entrusted".
It also confirmed it will launch a feature in the coming weeks that will enable users to download a copy of the data WhatsApp has collected on them - another requirement of GDPR. If they can't get permission, then see a restricted and non-personalised version of the site.