Set Details
- Set Number
- 135
- Name
- Building Set
- Year
- 1973
- Pieces
- 338
- Complexity
- Moderate
- Build Time
- 1-2 hours
- Ages
- 8+
- Type
- Play-focused
About LEGO Building Set
LEGO Building Set (set #135) is a detailed build with 338 pieces from the Universal Building Set theme, released in 1973. The Universal Building Set line features classic brick assortments for general building. This is a moderate-level build suitable for ages 8+, with an estimated build time of 1-2 hours. This set dates from the pre-minifigure era, before LEGO introduced its iconic yellow-faced figures in 1978.
Set Highlights
- 338 pieces at moderate complexity — a 1-2 hours build.
- Compatible with all standard LEGO sets — bricks extend naturally into other sets you own.
- Play-focused build with interactive elements designed for 8+ builders.
- Vintage 1973 release — increasingly rare in complete, unplayed condition.
Who Is This Set For?
Gift for Ages 8+
The moderate difficulty makes this accessible without being trivial — a well-matched gift for LEGO fans in the 8+ age range.
Weekend Build Project
338 pieces with an estimated 1-2 hours fits comfortably into a focused afternoon or weekend session.
Expanding a Universal Building Set Collection
A solid addition for collectors building out their Universal Building Set shelf. Introduces parts and builds that complement other sets from the same line.
Build Tips
A five-minute sort by color or piece type before starting saves time hunting for specific bricks mid-step.
Follow the numbered steps in sequence — structural elements early in the build support everything that comes after.
Vintage sets may show slight color variation from modern LEGO due to different ABS formulas. This is normal and part of the set's character, not a defect.
Finding Instructions
Instructions for older sets like #135 (1973) may not always be available on LEGO.com. Try searching the set number directly, or upload a photo of the bricks to LegoFinder — the AI can identify vintage sets from their parts.
Building Set FAQ
Related Reading
More Universal Building Set Sets
See all Universal Building Set →
Also Released in 1973
All 1973 sets →Similar Build Difficulty
Sets at roughly the same piece count and complexity tier — different theme and year, but a similar build experience.
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