ResearchedRetired
LEGO Creator 3in1 Medieval Castle 31120
A three-in-one castle for patient builders aged 9 and up.
Check the current price
Prices at other stores may differ · Links go to the retailer
LEGO retired this set at the end of 2024. See alternatives
Our verdict
Key details
- Ages 9+
- 1,426 pieces
- 3 builds
- A couple of hours (castle)
- Small parts
- Building sets
WARNING! CHOKING HAZARD. Small parts. Not for children under 3 years.
More info
- Item number: 31120
- Product line: Creator 3in1
- Released: 2021
- Retired: End of 2024
- Pieces: 1,426
- Minifigures: 3 (per LEGO)
- Built size: 10.5 in high, 12 in wide, 11 in deep
- Alternate builds: Catapult tower, marketplace
- List price: $99.99
Best for and who should skip it
Best for
- Builders aged 9 and up who can follow a long build over several sessions
- Castle and knights fans who want minifigures and a dragon
- Families who want one box that rebuilds into three models
Skip it if
- You want it new from LEGO, which retired it at the end of 2024
- They want a sturdy toy to carry around; owners say the sections come apart easily
- They mainly want the alternate builds, which owners rate lower than the castle
What we like and what to keep in mind
What we like
- Three builds in one box: castle, catapult tower, and marketplace
- Numbered bags break the build into sessions
- No stickers, according to Jay’s Brick Blog
- Owners say the main castle looks good on display
Keep in mind
- Retired by LEGO, so stock and prices depend on the seller
- Three minifigures is few for a set this size, owners say
- Owners describe the dragon’s joints as fiddly
- Needs a flat space about 12 by 11 inches once built
How we reviewed it
What owners say.
- 2 positive
- 1 mixed
Paraphrased from public owner reviews. Each one links to where it was posted.
Looks great on display, but the modular sections separate easily during play, and the castle needs a perfectly flat surface to sit well.
Strong value for the number of pieces and good minifigures. The owner found the alternate builds weak, the wall building repetitive, and the dragon flimsy.
Calls the main castle gorgeous but found the marketplace build underwhelming and the dragon’s clip joints unstable.
Sources.
What we read for this review, and when we last checked it.
- 01 LEGO. Medieval Castle 31120 (LEGO US product page, archived Dec 10, 2025)
- 02 Brickset. 31120-1: Medieval Castle
- 03 Brickset. Reviews of set 31120-1
- 04 Brickset. Review: 31120 Medieval Castle
- 05 Jay’s Brick Blog. LEGO Creator 3in1 31120 Medieval Castle review
- 06 BrickRanker. Medieval Castle 31120 retirement
How it compares.
This toy next to the alternatives we suggest, using the maker’s details.
| Detail |
This reviewLEGO Creator 3in1 Medieval Castle 31120
|
LEGO DUPLO Alphabet Truck 10421
|
LEGO Botanicals Flower Bouquet 10280
|
Blokees Transformers Classic Class 09 Optimus Prime
|
|---|---|---|---|---|
| Price | – | $39.99 | $59.99 | $19.99 |
| Maker’s age | Ages 9+ | Ages 2+ | Ages 18+ | Ages 12+ |
| Category | Building sets | Building sets | Building sets | Model kits |
| Pieces | 1426 | 36 | 756 | 88 |
| Build time | A couple of hours (castle) | – | About 1 hour | – |
| Good for | Castle fans aged 9+ ready for a big build | Toddlers aged 2+ starting letter play | Adults who want a short, calm display build | Transformers fans after a quick, light-up build |
| Stock | Retired – limited stock | Available | Available | Available |
Prices are the list prices we saw on the maker’s site and change often.
