LEGO Birthday Party Cake (40815)

Other · 219 pieces

From £11.99 at Kidinn · 8% off

Retiring by 31 December 2026 (70 days left) · How we estimate

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Compare prices (UK)

Regular price £12.99

See it at Kidinn, £11.99

Last chance: New copies of retired sets tend to get scarcer and pricier.

. Amazon offers can be third-party (marked).

Also retiring soon in Other

Price history

Lowest price today: £11.99; at Kidinn
Lowest we’ve recorded: £9.99; Kidinn, 13 Oct 2026
LEGO’s regular price: £12.99; today’s lowest is 8% off
Tracked since: 8 Oct 2026; 1 price change since

Price records (8)

21 October 2026 · Kidinn£11.99
13 October 2026 · Kidinn£9.99
10 October 2026 · Amazon.co.uk£12.99
10 October 2026 · Very£12.99
10 October 2026 · Argos£13.00
8 October 2026 · The Entertainer£13.00
8 October 2026 · John Lewis£12.99
8 October 2026 · LEGO.com UK£12.99

Prices at LEGO.com UK, Amazon.co.uk, Argos, Smyths Toys, Very, John Lewis, The Entertainer and Kidinn, checked daily. A line breaks when a store was out of stock or not selling the set.

LEGO Birthday Party Cake in other countries

The lowest price today in each country where LEGO sells it, converted at the European Central Bank’s rate. Delivery across borders isn’t included: most stores only ship inside their own country.

CountryLowest priceIn GBPStore

PolskaBest priceAmazon.plPLN 39.99£7.67Amazon.pl
DeutschlandAlternate€10.19£8.54Alternate
FranceAlternate€10.29£8.62Alternate
UK(this page)Kidinn£11.99£11.99Kidinn

Show all 13 countries

Exchange rates of 22 October 2026.

Resale value

What the LEGO Birthday Party Cake actually sold for on BrickLink, the LEGO-owned marketplace, in the last 6 months.

New

£8.75

Median of 3 sales (worldwide), from £8.42 to £13.15

-33% vs LEGO’s regular price (£12.99)

Used

No sales in the last 6 months.

Sales on BrickLink, updated daily (last update 23 October 2026). Sold in US dollars, shown in British Pound at the ECB rate of 22 October 2026. Few sales mean a less reliable figure.

Set details

Pieces: 219
Minifigures: None
Ages: 7+
Released: 2025
Set number: 40815
Theme: Other
Price per piece: 5.5pat today’s lowest price
LEGO.com rating: 4.3
LEGO Insiders points: 104

LEGO Birthday Party Cake building instructions

Instructions bookletPDF, 16 MB

Official instructions from LEGO.com, free to download. The LEGO Builder app has them too, many with 3D steps. All instructions on LEGO.com

LEGO Birthday Party Cake parts list

219 pieces in 40 different parts and colors.

×281748
×1824246
×1020482
×1030414
×1037775
×83023
×83070b
×83666
×811212
×811477
×815068
×815068
×824866
×824866
×63460
×43009
×43020
×43023
×43024
×43070b
×43710
×46003
×426604
×453119
×477844
×23008
×23024
×23068b
×23068b
×23710
×26636
×211211
×218980
×241740
×263864
×13069b
×13795
×13941
×118674
×169729

Parts list: Rebrickable.

About the LEGO Birthday Party Cake

Add a sweet touch to celebrations with this playful LEGO® Birthday Party Cake kit for boys, girls and loved ones aged 7 and up. The buildable birthday cake opens to reveal a hidden compartment where there are pink and yellow flowers to decorate the cake. Every birthday cake needs candles, and you’ll find 10 of them included. Choose how many to add to this LEGO birthday cake toy so you can personalize the cake to reflect kids’ ages.

This set makes a fun birthday gift that can be played with long after the celebrations are over. Why not create a family tradition and bring it out year after year as part of your birthday party decor? But it’s not just for birthdays. This LEGO cake set is also a fun gift or decoration for any special occasion. So get ready to serve an extra slice of fun at your next celebration.

Buildable birthday cake kit – This LEGO® Birthday Party Cake kit for boys, girls and loved ones aged 7 and up comes with decorations and candles to build a customizable celebration cake
LEGO® decorations – Add sugar-sweet birthday decorations to the cake with the flowers, swirls and candles
Includes 10 candles – Celebrate birthdays by personalizing the cake with the candles to match a child’s age or add all 10 to create a fun birthday decor display
Hidden compartment – The birthday cake toy features a hidden compartment where the decorations can be stored, making this a LEGO® set that can be played with or displayed time after time
A fun birthday gift for kids – This LEGO® cake set makes a great gift idea for kids aged 7 and up or for anyone celebrating a special occasion
Measurements – The main model in this 219-piece set measures over 2.5 in. (7 cm) high, 3.5 in. (9 cm) wide and 3.5 in. (9 cm) deep

Description: LEGO.com.

LEGO Birthday Party Cake: FAQ

Is the LEGO Birthday Party Cake retiring?

Yes: the LEGO Birthday Party Cake is retiring soon. LEGO flags it “Retiring soon” on LEGO.com UK (it already carried the flag when we started tracking on 8 October 2026). Expect it to be gone by 31 December 2026 at the latest (70 days), possibly sooner once stock runs out. LEGO doesn’t publish exact dates: this one is our estimate.

How much is the LEGO Birthday Party Cake?

The lowest price we found today is £11.99 at Kidinn, out of 7 stores selling it today (regular price £12.99). Prices change often: this page is updated every day.

Should I buy the LEGO Birthday Party Cake now or wait?

Retiring by 31 December 2026: buy it while you can. LEGO is retiring it: we expect it gone from LEGO.com UK by 31 December 2026, in 70 days. The best price today is £11.99 at Kidinn, 8% below LEGO’s regular price. New copies of retired sets tend to get scarcer and pricier.