Safety is the highest priority in the toy industry. You must ensure products comply with EN71 (Europe) or ASTM F963 (USA), which cover mechanical properties, flammability, and heavy metal content. Specifically, for small cars, the 'Small Parts Test' is vital to prevent choking hazards for children under 3 years old. Always verify that the supplier can provide a Children's Product Certificate (CPC) or a Declaration of Conformity (DoC) based on lab results from accredited third-party testers like SGS or Intertek.