Why a Container of Toys Gets Stuck at Customs
Importing Children's Products from China — Korea's KC Certification for Toys & Baby Goods, Age Grading, and Warning Labels

Hello, this is GreenFrog Seoul.

"Toys look like they'll sell, so I'm bringing some in from China — is there some kind of certification for that?"
"The factory says it has a European EN71 report. So I can just sell them in Korea, right?"
"I ordered toys and now they're telling me to add an 'under-3 warning' to the KC mark. What happens if I don't?"

These questions share one thing: they treat a toy as ordinary merchandise. But a product a child uses carries a different regulatory weight than an adult's household item — you have to build it for a user who swallows, chews, and puts things in their mouth. That's why Korea groups products children use separately, under the Special Act on Children's Product Safety. Miss that before you order, and you meet it later — as goods already on the water that stop at customs for lack of certification.

Pin the big picture up front and it gets far less confusing. Importing children's products splits into three questions. "Is my item even a children's product" — deciding whether it's used by a child aged 13 or under. "Which KC tier applies" — sorting, by risk, into Safety Certification, Safety Confirmation, or Supplier's Declaration of Conformity. And "does it pass labeling and customs" — the real gate of the KC mark, age and warning labels, and customs requirements. Today we walk through these three in order, then, centered on toys, add the test items and a feel for cost, what to check with the Chinese factory in advance, and the pitfalls that keep tripping people up on the ground.

Having covered product certification around KC, CE, FDA, and CCC at a high level (#10), and the separate gate for food-contact utensils and containers (#64), today is about the one where regulation is especially dense: children's products. The key is that separate from customs clearance, there's one more gate — the KC.

1. Why a Children's Product Isn't "General Merchandise"

The same plastic figure is merchandise if you sell it as an adult décor piece, but a children's product the moment you sell it as a kid's toy. The test is who uses it. The Special Act on Children's Product Safety groups products used, or expected to be used, by children aged 13 or under as "children's products," and once an item falls in that group, it gets safety standards and a certification process that differ from ordinary goods.

Roughly, the scope covers this: toys a child plays with (dolls, blocks, figures, play sets), children's textiles and clothing worn on the body, school supplies and stationery, kids' furniture and dishware, and sports and play equipment. Ask yourself "does a child ultimately use this," and the call usually isn't hard. It especially calls for a closer look if the item has parts small enough to swallow or a surface that meets the mouth.

Why does this distinction matter? Because the moment goods cleared as general merchandise get reclassified as children's products, you have to start certification and labeling over from scratch. It's safer to begin by understanding the two-track structure — customs handles clearance, and the KC system (under the Korean Agency for Technology and Standards) handles children's-product safety.

2. The Three KC Tiers — Safety Certification, Safety Confirmation, SDoC

For children's products, KC isn't one thing — it splits into three tiers by risk level. Where your item lands changes the weight of the procedure, the cost, and the timeline dramatically, so sorting this out comes first.

The items above are only examples to give you a feel. Actual classification is set by the relevant public notices — and those get revised — so before you order, you must confirm exactly which tier your item falls under. Even within "for children," the tier splits by the specific product category.

What you meet most in import practice is toys, and toys are generally a Safety Confirmation item. The flow: get the product tested against the safety standard at a designated lab, file a safety-confirmation declaration on those results, receive a declaration number, and display it with the KC mark. Unlike Safety Certification, a factory audit doesn't attach every time — but the testing itself is by no means light.

3. Toy Safety Confirmation in Practice — What Gets Tested

Toy Safety Confirmation testing looks at two branches. One is hazardous substances, the other physical and mechanical safety. The premise that a child touches, sucks, and mouths the item runs through the test items everywhere.

Hazardous substances — keeping them out of the body

Typically the tests watch for heavy metals like lead and cadmium, the migration of certain elements (heavy metals) from paint and plastic, and phthalate plasticizers that make soft plastic pliable. The core is whether a hazardous substance transfers into the body when a child sucks or swallows the surface. Painted wooden toys and soft PVC toys are especially prone to getting caught here.

Physical and mechanical safety — keeping kids from getting hurt

The most famous is small parts. A part small enough for a child under 3 to swallow, if it comes off, poses a choking hazard, so it's watched strictly. Also checked: sharp edges and points, easily detached parts like eyes and noses, the length of cords and strings, magnet strength (risk of intestinal perforation if swallowed), flammability, and more. A single little decoration added "because it looks cute" often decides the test.

It helps to get a feel for cost and time too. The testing fee varies widely by item, number of test items, and number of models — a simple product starts in the range of a few hundred thousand won, but a complex build or multiple models climbs much higher. Figure roughly a few weeks from sampling to results, longer if a re-test comes back. Exact figures and timelines depend on the item and the lab, so it's safer to fold this certification cost and lead time into the first order's quote up front.

4. Age Grading and Warning Text — the Label Is a Pass Condition

Passing the test isn't the finish. For children's products, labeling matters as much as certification. Fail to include the required items on the product or packaging, and you can be caught for a labeling violation even when the goods are perfectly fine.

The KC mark and mandatory markings

For a toy, you display the KC mark and the safety-confirmation declaration number, along with the manufacturer (or importer), country of manufacture, date of manufacture, age of use, and cautions and warnings. For an import, it's especially important that the importer's details go on. How this label gets printed and applied has to be aligned with the factory at the order stage.

Age of use and the "under-3" warning

A children's product must show the age of use, and a toy with small parts, unsuitable for children under 3, must carry a warning to the effect that it is "not suitable for children under 3." It's a marking meant to prevent swallowing and choking. On top of that, separate cautions and warnings may be required depending on the toy — balloons, magnets, cords, and so on. The label text looks trivial, but leave it out and it snags you at the clearance and sales stage.

5. Choosing the Chinese Factory — What to Check

You take KC testing in Korea, but the pass rate is decided in large part by which factory you chose. A factory that has made toys and one that hasn't differ in their fundamentals on hazardous substances and structural safety.

• Export certification experience: a factory that has met toy safety standards like Europe's EN71 or the US ASTM F963 is used to managing hazardous substances and small parts. The items aren't 100% the same as KC, but the experience of building safety into the design itself lifts the pass rate.
• China's CCC: some toys are subject to mandatory certification (CCC) in China too. A factory that has been through CCC tends to be comfortable with testing and paperwork, which makes collaboration smoother.
• Material and component control: check where they source paint, plastic, magnets, and parts, and whether it changes lot to lot. Hazardous substances ultimately come from the raw materials.
• Existing test reports: EN71 or ASTM reports a factory holds are good reference, but they don't exempt you from KC, because standards and items differ by country. Use them as a basis for understanding material and structure, but schedule KC testing separately.

6. Customs and the Risk of Being Uncertified

For children's products, certification and labeling requirements come up at the clearance stage. As it lets the goods in, customs also looks at whether the product is a KC-scope item and whether certification/declaration and labeling are in place. Leave a requirement empty here and clearance stops.

If being uncertified or unlabeled is caught, it doesn't stop at a clearance hold or return — goods already on the market can become subject to recall or a sales halt. Because these are items children use, the follow-up and recall standards are strict. That's why for toys and baby goods, the value of preparing before you order is unusually high (#47).

7. Practical Tips — Keep the Order and Accidents Drop

Lay everything above onto the first-order flow and it comes together like this.

• Scope and tier check: first confirm whether your product is a children's product, and which of Safety Certification / Safety Confirmation / SDoC applies (Sections 1–2).
• Sample pre-test: running KC testing on a sample before the bulk order lets you screen out hazardous-substance and small-parts problems before mass production.
• Sort out the certification holder: for imported toys, the certification/declaration holder is usually the importer. Make the certification name and where responsibility sits clear at the start, so labeling and follow-up don't tangle later.
• Lock the label: hand the factory the Korean label artwork carrying the KC mark, age, and warning before you order (Section 4).
• Build in lead time: put the testing and declaration period into the season schedule up front.

The one I especially recommend is the sample pre-test. Make a few thousand units and have the mass goods caught on a hazardous substance, and that whole quantity gets tied up — but test a sample before ordering, and you find the problem far more cheaply. The more it's an item a child uses, the better it is not to risk the entire order value and your brand's trust trying to save a bit of testing cost.

8. Children's Product Import Checklist

Scope and tier

• Confirmed whether the product is a children's product used by a child aged 13 or under
• Determined which of Safety Certification / Safety Confirmation / SDoC applies
• Sorted out how far the same series groups into one model / derivative models

Testing and labeling

• Pre-tested hazardous substances and physical safety like small parts on a sample
• Locked the KC mark, declaration number, importer, age of use, and under-3 warning into a Korean label
• Made the certification/declaration holder (importer) and where responsibility sits clear

Factory and schedule

• Assumed KC testing is needed, separate from EN71/ASTM reports
• Planned pre-shipment inspection to confirm mass goods come out in the same material and parts as the approved sample
• Worked the testing and declaration lead time back into the season schedule

Closing — A Product That Needs One More Stamp

Today's content, compressed one line each:

• Scope: if a child aged 13 or under uses it, it isn't merchandise but a children's product governed by the Special Act on Children's Product Safety
• Tier: it splits by risk into Safety Certification, Safety Confirmation, and SDoC — and toys are generally Safety Confirmation
• Testing: hazardous substances (lead, cadmium, phthalates) and physical safety like small parts, and since certification is by model, grouping derivative models drives the cost
• Labeling: the KC mark, importer, age of use, and under-3 warning must go on in Korean, and a missing label is a violation too
• Factory: an EN71/ASTM-experienced factory has an edge, but KC is separate, and you work the testing and declaration period back into the season

The substance of importing children's products comes down to this: it doesn't end at a single customs stamp — there's one more gate, the KC, and knowing it before you order. The few days spent judging the tier and pre-testing a sample on the first order later head off goods stuck at customs and recalls of what you've already sold. If you're preparing toys or baby goods and can't tell which KC tier they fall under, or which testing and labeling to take in what order, feel free to reach out. From scope check to factory selection, sample pre-testing, and locking the Korean label, we'll help in one flow.