The recalled magnetic cubes violate the mandatory standard for toys because the cubes were packaged with loose high-powered magnets, posing an ingestion hazard to children. When high-powered magnets are swallowed, the ingested magnets can attract each other, or other metal objects and become lodged in the digestive system. This can result in perforations, twisting, and/or blockage of the intestines, blood poisoning and death.
Read the official CPSC recall notice and consumer instructions.