Set Details
- Set Number
- 7646
- Name
- ETX Alien Infiltrator
- Theme
- Space
- Year
- 2008
- Pieces
- 333
- Complexity
- Moderate
- Build Time
- 1-2 hours
- Ages
- 8+
- Type
- Play-focused
About LEGO ETX Alien Infiltrator
LEGO ETX Alien Infiltrator (set #7646) is a detailed build with 333 pieces from the Space theme, released in 2008. The Space line features spacecraft, moon bases, and interstellar exploration. This is a moderate-level build suitable for ages 8+, with an estimated build time of 1-2 hours.
Set Highlights
- 333 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.
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
333 pieces with an estimated 1-2 hours fits comfortably into a focused afternoon or weekend session.
Expanding a Space Collection
A solid addition for collectors building out their Space 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.
For active play sets, key connection points (hinges, turntables, clip joints) can loosen over time — a small dab of LEGO's own tube clutch lubricant on the stud resolves most looseness without damage.
Finding Instructions
Building instructions for LEGO ETX Alien Infiltrator (#7646) 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.
ETX Alien Infiltrator FAQ
Related Reading
More Space Sets
See all Space →
Also Released in 2008
All 2008 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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