The phrase "child aspirin" refers to a type of medicine that is safe for children to take. It is a smaller dose of aspirin that is used to relieve pain and reduce fever for kids. Full definition
Never give a baby or child aspirin as it can cause a serious illness. (thebabycorner.com)
Never give your child aspirin as it makes her more susceptible to Reye's syndrome, a rare but potentially fatal complication. (babycenter.com)
(Never give your child aspirin, which can trigger a rare but potentially fatal disease caused Reye's syndrome in children with a virus.) (babycenter.com)