How many pieces are in the Birthday Cupcake?

Birthday Cupcake contains 174 pieces.

What age is the Birthday Cupcake recommended for?

This set is recommended for ages 7+.

When was the Birthday Cupcake released?

Birthday Cupcake was released in 2026.

⚠ RETIRING SOON

1 / 5

🏛 Seasonal

Set #40905

Birthday Cupcake

The Birthday Cupcake is a delightful and customizable little set.

Before you buy

Who it's for: Ages 7+ · Beginner build Ideal for kids aged 7+ who enjoy creative building and customization.
Build: 174 pieces · about 1.5 hours Build time is an estimate.
Availability: Retiring soon · expected exit Dec 31, 2026

★★★★☆ 4.0 AI-generated review score, not a customer rating

Fans appreciate the set's customizable nature and bright colors, making it a fun and engaging build for kids. Some feel the piece count is low for the price, but overall, it's considered a charming and worthwhile addition to a LEGO collection.

Check price on eBay

📝 Our Take

AI-assisted editorial summary, grounded in our LEGO database and public community discussions. How we use AI

The Birthday Cupcake is a delightful and customizable little set. It offers a fun, creative experience, allowing builders to personalize their LEGO birthday treat with a variety of colorful tiles and shapes.

This set is perfect for younger LEGO fans and those looking for a quick, enjoyable build. It makes an excellent small gift or party favor, and the customizable aspect adds to the play value.

Skip this if you're looking for a challenging or complex build. For more intricate LEGO models, consider sets from the Creator Expert or Technic lines.

✨ New

Ask BlockTalk about this set

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BlockTalk

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Try asking:

How many different ways can you customize the Birthday Cupcake? What other LEGO sets would pair well with this for a birthday-themed display? Is this set a good value for the price and piece count? How long is this set expected to be available before it retires?

🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI

🧩

174

Pieces

⏱

1.5h

Estimated Build Time

📊

Beginner

Difficulty

📏

10cm × 11cm × 8cm

Dimensions

Build Highlights:

Easy-to-follow instructions perfect for younger builders
Customizable design allows for unique and personalized creations
Bright and cheerful color scheme
Sturdy construction ensures the cupcake can be displayed without worry

📈 Investment Analysis

AI-assisted investment analysis, grounded in our LEGO database and public community discussions. How we use AI

Not enough price history for a trend

C+

Investment Grade

⏳ Retiring soon

The Birthday Cupcake set has moderate investment potential. As a seasonal set, its availability might be limited, which could drive up its value after retirement. The low piece count and relatively common parts might limit significant appreciation, but its appeal as a gift item could sustain demand. Its small size and price point make it an accessible entry point for LEGO investing.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

⚖ Compare Similar Sets

Halloween Cat & Mouse

Seasonal • 328 pcs

$12.99

Easter Rabbits Display

Compared to other seasonal LEGO sets, the Birthday Cupcake offers a unique customizable element. While sets like the Easter Bunny or Halloween Cat offer holiday-specific builds, this set is more versatile and can be displayed year-round. Its price point is similar to other small seasonal sets, making it a good alternative for those seeking a fun, affordable LEGO gift.

1 Minifigure Included

Chef, White Short Legs

4 parts

C+

The set includes a chef minifigure holding a balloon animal, adding a playful element and making it a desirable addition to any LEGO minifigure collection.

📦 Parts Inventory

Official piece count: 174
Parts cataloged in this inventory: 38 unique parts, 170 pieces
Minifigures: 1

The official piece count includes the 4 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Missing a piece? Check this set piece by piece, with look-alike colors flagged and element IDs for replacements.

Tile, Star with S...

Part #: 11609 4× Pearl Gold

Plate Special 1 x...

Part #: 15573 4× Bright Pink

Plate Special Rou...

Part #: 18674 1× Medium Azure

Brick Special 1 x...

Part #: 22885 2× White

Plant, Flower, Pl...

Part #: 24866 1× Green

Tile Round 1 x 1 ...

Part #: 25269 4× Medium Azure

Tile Round 1 x 1 ...

Part #: 25269 4× Medium Lavender

Tile Round 1 x 1 ...

Part #: 25269 4× Orange

Tile Round 1 x 1 ...

Part #: 25269 4× Yellow

Tile Round 1 x 1 ...

Part #: 25269 4× Lime

Tile Round 1 x 1 ...

Part #: 25269 4× Medium Nougat

Plate Special 1 x...

Part #: 2540 1× White

Brick 2 x 4

Part #: 3001 2× Bright Pink

Brick 1 x 2

Part #: 3004 4× Reddish Brown

Plate 2 x 4

Part #: 3020 4× Reddish Brown

Plate 2 x 4

Part #: 3020 2× White

Plate 2 x 2

Part #: 3022 2× Bright Pink

Plate 4 x 6

Part #: 3032 3× Reddish Brown

Brick Sloped 18° ...

Part #: 30363 4× Reddish Brown

Brick Sloped 45° ...

Part #: 3040b 8× Reddish Brown

Brick Special 1 x...

Part #: 30414 4× Lime

Plate Round Corne...

Part #: 30565 4× Bright Pink

Brick Round 1 x 1...

Part #: 3062b 8× Medium Azure

Brick Round 2 x 2...

Part #: 3262 1× Red

Food Hot Dog / Sa...

Part #: 33078 1× Bright Green

Plate Special 1 x...

Part #: 35480 2× White

Plate Special 1 x...

Part #: 35480 2× Light Bluish Gray

Brick Curved 1 x ...

Part #: 3563 4× Reddish Brown

Balloon Dog

Part #: 35692 1× Trans-Dark Blue

Plate 1 x 6

Part #: 3666 2× Reddish Brown

Plate 1 x 6

Part #: 3666 2× Medium Azure

Plate 1 x 4

Part #: 3710 6× Medium Nougat

Plate 1 x 4

Part #: 3710 6× Red

Wave / Flame Smal...

Part #: 37775 8× Trans-Orange

Tile 1 x 1 Heart

Part #: 39739 4× Red

Plate Special 2 x...

Part #: 4304 4× Yellow

Brick Wedged, Slo...

Part #: 43710 4× Reddish Brown

Brick Wedged, Slo...

Part #: 43711 4× Reddish Brown

Dish 3 x 3 Invert...

Part #: 43898 1× White

Bar 7 x 3 with Do...

Part #: 5630 1× Yellow

Brick Round, Curv...

Part #: 5846 12× Bright Pink

Plate Round 1 x 1...

Part #: 6141 4× Yellow

Plate Round 1 x 1...

Part #: 6141 4× Dark Pink

Plate Special 4 x...

Part #: 64799 2× Light Bluish Gray

Brick Special 1 x...

Part #: 67329 4× Light Bluish Gray

Plate Round Corne...

Part #: 79491 6× White

Plate Special 2 x...

Part #: 87580 2× White

Brick and Axle Se...

Part #: 96874 1× Orange

The set offers a good selection of curved and rounded pieces in Bright Pink and Medium Azure, useful for MOC builders looking to add organic shapes and vibrant colors to their creations.

🛒 Where to Buy

eBay

Search listings

→

💎 Notable Parts

Bright Pink Brick Curved 2 x 2 x 1 Curved Top, Corner (12x) $1.20

Trans-Orange Wave / Flame Small with Pin (8x) $1.60

Medium Azure Brick Round 1 x 1 Open Stud (8x) $0.80

Pearl Gold Tile, Star with Stud Holder, Pin Hole (4x) $1.00

Est. BrickLink Part Value

$4.60

💡 MOC Potential

🏙 Miniature bakery scene

🌳 Flower display using cupcake base

🏰 Small tower or turret

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

Based on 7 videos

3.0 /5

Mixed

0% positive

BlockTalk AI

Overall sentiment towards the Birthday Cupcake (40905-1) is mixed, with reviews leaning neutral. ellieV's video showcases the set as a LEGO DOTS DIY craft, highlighting its cupcake-themed components. The overall impression is that it's a creative kit, but its true nature as a LEGO set is apparent.

Cupcake decorating (but with Lego) DIY craft

ellieV • 263.3K views Review

Community Sentiment

Based on 7 YouTube reviews

Not enough Reddit data

YouTube

3.0 /5

Mixed

0% positive

Positive

Mixed

Critical

BlockTalk AI Analysis

What the Community Says

1 YouTube reviews

BlockTalk AI Summary

ellieV presents the set as a cupcake decorating activity using LEGO elements, suggesting its appeal as a DIY craft. The review acknowledges the set's identity as a LEGO product despite its cupcake theme.

Reddit Reviews

No Reddit reviews found

YouTube Reviews

1 video

Cupcake decorating (but with Lego) DIY craft

ellieV

263.3K views Review

Community Content: These reviews are from Reddit and YouTube users sharing their personal experiences. Opinions may vary.

📖 Building Instructions 2

BI 3105, 40, 40905 V29

Download PDF

BI 3105, 40, 40905 V39

Download PDF

Inventory Statistics

Unique Parts

174

Official Piece Count

170

Cataloged Inventory Pieces

Minifigures

Spare Parts

The official piece count includes the 4 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Inventory Version: 1

Missing a piece? Use the Missing Piece Checker.