Compliance is a major price driver. For the US market, products must meet CPSIA standards for lead and phthalate content, especially if used in children's footwear. For the EU, CE marking and RoHS compliance are mandatory to ensure the absence of hazardous substances in electronics. Additionally, because these contain batteries, they must pass UN38.3 air/sea transport testing. Sourcing from a supplier on Made-in-China.com that provides these certifications upfront will prevent costly customs seizures.