Head-to-head
LEGO Ideas Grand Piano vs LEGO Ideas Home Alone
Both built. Both reviewed. Here's how they actually compare on the things that matter.
Set #21323
LEGO Ideas Grand Piano
The keys press. The hammers strike. The app plays music. The most mechanically ambitious LEGO Ideas set ever shipped.
Set #21330
LEGO Ideas Home Alone
Five movie-accurate rooms, the front door booby traps, and Marv hanging upside down in the basement. The most lovable LEGO Ideas set of the last five years — and now retired.
By the numbers
The spec sheet.
| Metric | LEGO Ideas Grand Piano | LEGO Ideas Home Alone |
|---|---|---|
| Rating | 5/5 | 5/5 |
| Pieces | 3,662 | 3,955WINS |
| MSRP | $379.99 | $279.99WINS |
| Price per piece | $0.10 | $0.07WINS |
| Verdict | Must buy | Must buy |
| Best for | Musicians, kinetic-LEGO appreciators, and serious LEGO Ideas collectors with substantial display space and budget. | Home Alone fans, builders who love modular dollhouse-style sets, and collectors hunting retired Ideas grails. |
Pros & cons
What I actually noticed.
LEGO Ideas Grand Piano
Pros
- Working keys with motorized hammer mechanism
- Bluetooth app integration for actual music playback
- Lifting top panel reveals the strings and hammer assembly
- Working pedals (sustain and una corda)
- Compact bench and music-rest accessories
Cons
- Powered Up motor sold separately (adds $80+ for full functionality)
- App-only music playback — no standalone speaker
- $380 commitment — among the highest LEGO Ideas MSRPs
LEGO Ideas Home Alone
Pros
- Five rooms, fully furnished, every key movie scene captured
- The 'booby trap' details — paint cans on the stairs, BB gun, hot doorknob, tarantula
- Marv hanging upside down from the basement stairs — most-photographed LEGO scene of 2022
- Retired since 2023 — secondary market up 50%+ over MSRP
- Front of the house opens like a dollhouse for full interior access
Cons
- Aftermarket pricing has crossed into 'is this really worth $450' territory
- Some of the smaller booby-trap details are fragile and easy to misplace
- Christmas-themed build is harder to display year-round
Made up your mind?
Pick a retailer.
Comparison generated from our individual reviews. Pros, cons, and ratings come from full hands-on builds — see each review for the complete take.