Head-to-head
LEGO Ideas Grand Piano vs LEGO Ideas Seinfeld
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 #21328
LEGO Ideas Seinfeld
Jerry's apartment. The iconic couch. Five characters. The most accurate sitcom-set LEGO recreation ever shipped — and now retired.
By the numbers
The spec sheet.
| Metric | LEGO Ideas Grand Piano | LEGO Ideas Seinfeld |
|---|---|---|
| Rating | 5/5 | 5/5 |
| Pieces | 3,662WINS | 1,326 |
| MSRP | $379.99 | $79.99WINS |
| Price per piece | $0.10 | $0.06WINS |
| Verdict | Must buy | Must buy |
| Best for | Musicians, kinetic-LEGO appreciators, and serious LEGO Ideas collectors with substantial display space and budget. | Seinfeld fans, sitcom collectors, and LEGO Ideas hunters chasing retired display pieces. |
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 Seinfeld
Pros
- Iconic Seinfeld apartment — couch, kitchen, breakfast counter, all canonical
- Five minifigures: Jerry, George, Elaine, Kramer, Newman
- Retired since 2023 — secondary market up 100%+
- 30 Rock-perfect kitchen and breakfast bar staging
- Comic books, cereal boxes, and other sitcom accessories included
Cons
- Aftermarket has crossed $160 sealed
- No bedroom or bathroom (just the main living/kitchen area)
- Some interior wall printing is sticker-based
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.