The U.S. Public Interest Research Group (U.S. PIRG) says that Playskool crayons tested positive for asbestos. If it's inhaled or ingested, it can lead to lung cancer and mesothelioma, and they are calling on retailers like Dollar Tree and Amazon to pull the items from their stock, according to the story in the Washington Post. Dollar Tree executives say independent tests show levels are safe and there is no safety issue.