LEGO Extension Assortment for LEGO Composing Set 9550
Set #49901 · 1990 · 121 pieces · Quick build
Set Details
- Set Number
- 49901
- Name
- Extension Assortment for LEGO Composing Set 9550
- Year
- 1990
- Pieces
- 121
- Complexity
- Quick
- Build Time
- 20-45 minutes
- Ages
- 6+
- Type
- Play-focused
About LEGO Extension Assortment for LEGO Composing Set 9550
LEGO Extension Assortment for LEGO Composing Set 9550 (set #49901) is a mid-sized build with 121 pieces from the Educational and Dacta theme, released in 1990. The Educational and Dacta line features classroom and learning-oriented kits for STEM education. This is a quick-level build suitable for ages 6+, with an estimated build time of 20-45 minutes. This set dates from the 1990s, a turbulent decade when LEGO launched Star Wars and Mindstorms while navigating financial difficulties.
Set Highlights
- 121 pieces at quick complexity — a 20-45 minutes build.
- Compatible with all standard LEGO sets — bricks extend naturally into other sets you own.
- Play-focused build with interactive elements designed for 6+ builders.
- Vintage 1990 release — increasingly rare in complete, unplayed condition.
Who Is This Set For?
Gift for Ages 6+
The quick difficulty makes this accessible without being trivial — a well-matched gift for LEGO fans in the 6+ age range.
Weekend Build Project
121 pieces with an estimated 20-45 minutes fits comfortably into a focused afternoon or weekend session.
Expanding a Educational and Dacta Collection
A solid addition for collectors building out their Educational and Dacta shelf. Introduces parts and builds that complement other sets from the same line.
Build Tips
Check the piece count on the bag against the parts list before starting — knowing what you have prevents mid-build surprises.
Even in small sets, connection order matters. Follow the steps rather than building sections independently.
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
Building instructions for LEGO Extension Assortment for LEGO Composing Set 9550 (#49901) are available as a free PDF on LEGO.com. You can also upload a photo of this set to LegoFinder to identify it and access the instructions directly.
Extension Assortment for LEGO Composing Set 9550 FAQ
Related Reading
More Educational and Dacta Sets
See all Educational and Dacta →
Also Released in 1990
All 1990 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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