How can personal data about children be collected?
https://ec.europa.eu/info/law/law-topic/data-protection/reform/rights-citizens/how-my-personal-data-protected/can-personal-data-about-children-be-collected_en
How should my consent be requested?
https://ec.europa.eu/info/law/law-topic/data-protection/reform/rights-citizens/how-my-personal-data-protected/how-should-my-consent-be-requested_en
What happens if data I have shared is leaked?
https://ec.europa.eu/info/law/law-topic/data-protection/reform/rights-citizens/how-my-personal-data-protected/what-happens-if-data-i-have-shared-leaked_en
General information:
https://ec.europa.eu/info/law/law-topic/data-protection/reform/rights-citizens_en
https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1528874672298&uri=CELEX%3A32016R0679
https://ec.europa.eu/info/law/law-topic/data-protection/reform/rules-business-and-organisations_en