Set Details
- Set Number
- 70433
- Name
- J.B.'s Submarine
- Theme
- Hidden Side
- Year
- 2020
- Pieces
- 224
- Complexity
- Moderate
- Build Time
- 1-2 hours
- Ages
- 8+
- Type
- Play-focused
About LEGO J.B.'s Submarine
LEGO J.B.'s Submarine (set #70433) is a mid-sized build with 224 pieces from the Hidden Side theme, released in 2020. The Hidden Side line features haunted locations with augmented reality ghost-hunting gameplay. This is a moderate-level build suitable for ages 8+, with an estimated build time of 1-2 hours.
Set Highlights
- 224 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
224 pieces with an estimated 1-2 hours fits comfortably into a focused afternoon or weekend session.
Expanding a Hidden Side Collection
A solid addition for collectors building out their Hidden Side 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.
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 J.B.'s Submarine (#70433) 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.
J.B.'s Submarine FAQ
Related Reading
More Hidden Side Sets
See all Hidden Side →
Also Released in 2020
All 2020 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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