An appeals court has revived a lawsuit that accuses Google, YouTube, DreamWorks, and a handful of toymakers of tracking the activity on YouTube of children under 13. In an opinion released Wednesday, the Ninth US Circuit Court of Appeals ruled that the Children's Online Privacy Protection Act does not bar lawsuits based on individual state privacy laws. Passed in 1998 and amended in 2012, COPPA requires websites to obtain parental consent for the collection and dissemination of personally identifiable information of children under the age of 13. COPPA gives the FTC and state attorneys general the ability to investigate and levy fines for violations of the law.