Compliance is the most critical factor in toy sourcing. For the US market, products must adhere to ASTM F963 and CPSIA (Consumer Product Safety Improvement Act) regulations, requiring third-party testing for lead and phthalates. For the EU market, toys must carry the CE Mark and comply with EN71 (Parts 1, 2, and 3) regarding mechanical properties, flammability, and chemical migration. Always verify that the supplier possesses a Children's Product Certificate (CPC) or a Declaration of Conformity (DoC) before finalizing a purchase.