Quick Answer
✅ Yes. TSA allows Lego bricks, sets, and toys in both carry-on and checked luggage.
✈️ Loose Lego pieces may be inspected more closely at security.
⚠️ Large sets with electronic components (motors, batteries) must follow battery rules.
Details
- Carry-on:
- Lego sets, mini-figures, and loose bricks are permitted.
- TSA may inspect bags with large amounts of Lego due to density on x-ray.
- Lego with electronic motors or lights powered by batteries must follow the lithium battery rules.
- Checked luggage:
- Lego is allowed in any amount.
- Pack securely to avoid pieces spilling.
- Kids traveling with Lego:
- Great option for in-flight entertainment.
- Small kits or pre-packed bags of Lego work best for flights.
- International flights:
- No special restrictions, though customs may check brand-new, boxed Lego sets as merchandise.
TSA Lego Rules Summary
| Lego Item Type | Carry-On | Checked |
|---|---|---|
| Loose Lego bricks | ✅ Allowed | ✅ Allowed |
| Lego sets (boxed or built) | ✅ Allowed | ✅ Allowed |
| Lego with battery-powered motor | ✅ Allowed (battery rules apply) | ✅ Allowed |
Gotchas / Common Issues
- ✈️ X-ray confusion: Large amounts of Lego may trigger a manual bag search.
- ✈️ Battery rules: Lithium batteries for Lego motors/lights must be in carry-on, not checked.
- ✈️ Mess risk: Loose Lego pieces can spill everywhere — use zip bags.
- ✈️ Best practice: Bring a small travel kit for kids to play with on flights.