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Last reviewed: September 2026 · Copy link
CPC for wooden building blocks
Which rules apply to wooden building blocks
- Wooden blocks for children need toy mechanical testing, finish/lead screening, and small-parts assessment by age grade.
- CPSIA section 101 total lead content in accessible substrate materials.
- 16 CFR part 1303 lead in paint and surface coatings where painted or coated.
- CPSIA section 103 tracking labels: manufacturer, location, and date of manufacture on product and packaging.
The testing and certification path
Finish chemistry, splinter/structural edges, and set uniformity when many shapes ship together.
Book testing at a laboratory that is CPSC-accepted for each rule, issue the CPC in your own name citing the rules your report supports, and keep the certificate with its test report for at least five years. Marketplaces ask for the pair, not the certificate alone.
Questions people ask
Are unfinished blocks exempt from lead testing?
Uncoated wood is lower risk, but inks, paints, oils, and brand stamps are screened. Confirm with the lab.
Do alphabet blocks need extra review?
Printed faces add coating lead risk per color.
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