- Build a birthday diorama – Create a party scene to mark any LEGO® fan’s birthday. The set includes lots of celebratory details, including balloons, a candle, cakes, gifts and “Happy Birthday” signage
- Send birthday wishes – Why not give this LEGO® Birthday Diorama (40584) as a gift to mark the birthday of a friend or loved one of any age from 6+
- Dimensions – The scene measures over 3.5 in. (9 cm) high, 3 in. (8 cm) wide and 3 in. (8 cm) deep
Lego® Miscellaneous 40584 Birthday Diorama
Current best price
Market value (new, sealed) on 7 November 2026: £11.82 – 8% above RRP (£10.99).
LEGO 40584 is currently available from £24.95 incl. shipping at eBay. Only one retailer in our comparison stocks it.
Updated 6 November 2026 at 21:33
Lego 40584 price comparison: where is it cheapest?
Prices incl. shipping to the UK ·
Brickfact may earn a commission when you buy through a merchant link. Commissions do not determine the order of offers. How Brickfact compares prices
iFurther information
The Lego set Birthday Diorama with the set number 40584 is part of the LEGO Miscellaneous theme and is recommended for ages 6+. It was released in January 2023. It includes 2 minifigures. The model has 157 pieces, and we estimate it takes around < 1 hour to build. It was designed by Dan Squirrell.132 Brickfact users have this set in their collection.
The set weighs about 0.190 kg. The box measures 6.2 x 5.6 x 2.4 in (15.7 x 14.1 x 6.1 cm). The recommended retail price is £10.99.
Our Brickfact Lego price comparison compares the prices of 1 shop for this set. It is currently cheapest at eBay for £24.95 including shipping. That is £0.16 per piece. Unfortunately, the set is currently not available below its recommended retail price.
The Part-Out-Value (POV) is the sum of the average prices paid on bricklink.com for all parts of this set. It is about £10.90.
Lego 40584 product data
Set Information
Set ID
40584
Theme
Pieces
157
Designer
Dan Squirrell
Building Time
< 1 hour
Age Range
6+
Minifigures
2
Availability
Release
01/2023
Retiring Status
Retired (12/2023)
Price Information
RRP
£10.99
Insiders Points (for purchase at Lego)
88
Part Out Value
£10.90
i
Packaging
Weight
0.190 kg
Packaging dimensions
6.2 x 5.6 x 2.4 in
EAN (GTIN13)
5702017434773
Popularity with Brickfact users
- users have this set
- 132
132 Brickfact users have Birthday Diorama in their collection.
Based on anonymized Brickfact user collections; shown only for sets with at least 10 users. As of 7 November 2026.
Lego 40584 price trend
Average sale price on secondary marketplaces – not the new price at retailers.
- Current market value
- £11.82
- Growth vs. RRP
- +7.6 % £10.99
- Range
- £9.19 – £12.18
- Average
- £10.94
Loading price history…
Lego 40584 price history: how has the price changed?
Brickfact has been recording retailer prices since 25/10/2026. Best price so far: £24.95 (13 days ago).
- Current best price
- £24.95 +127% vs. RRP
- Best price since 25/10/2026
- £24.95 +127% vs. RRP · 13 days ago
Daily lowest prices at the tracked shops, including shipping. Gaps indicate days with no recorded price. The table lists each shop’s lowest price.
Lowest price per retailer (since 25/10/2026)
| Retailer | Current | Lowest price | Date |
|---|---|---|---|
 eBay | £24.95 | £24.95 | 06/11/26 |
Lowest price per day that Brickfact recorded at the retailers in the price comparison, including shipping where known – as in the comparison above. Amazon offers are not included in the price history.
Minifigures from 40584 Birthday Diorama
The Birthday Diorama set includes 2 different minifigures, 2 of which are unique to this set. The combined value of the minifigures is £2.84, which is ~26% of the RRP of this set.
x1
Boy - White Shirt, Dark Azure Short Legs, Dark Purple Top Hat
Holiday & Event
2023
#hol323
£1.37
i
Unique
x1
Girl - Bright Pink Top with Butterflies and Flowers, Tan Short Legs, Dark Azure Hair
Holiday & Event
2023
#hol324
£1.47
Unique
Official Set Description for LEGO 40584 Birthday Diorama
Mark your birthday or send a celebratory gift to friends or family with this sweet LEGO® Birthday Diorama (40584). The set includes lots of colorful birthday details, including balloons, a candle, cakes, gifts and “Happy Birthday” signage. There are also 2 minifigures to add to the party vibe. Use the changeable scenery to customize your build.
Building Instruction for LEGO 40584 Birthday Diorama
Part Lists for LEGO 40584 Birthday Diorama
LEGO 40584 Frequently Asked Questions
How much does LEGO 40584 Birthday Diorama cost?
On 6 November 2026, the lowest price in the Brickfact price comparison is £24.95 incl. shipping at eBay. The RRP is £10.99.
Where can I buy LEGO 40584 cheapest?
Only one retailer in the Brickfact price comparison currently stocks LEGO 40584: eBay (£24.95).
Is LEGO 40584 still available?
LEGO has retired 40584 Birthday Diorama. New copies are still available at 1 retailers in our price comparison while stocks last.
Can this LEGO set be used to celebrate birthdays?
Yes, this LEGO set is specifically designed to be used as a celebratory gift or to mark birthdays.
What does the LEGO Birthday Diorama set include?
The LEGO Birthday Diorama set includes colorful birthday elements such as balloons, a candle, cakes, gifts, and "Happy Birthday" signage. It also comes with 2 minifigures to add to the party atmosphere.
Can this LEGO set be customized?
Absolutely! The LEGO Birthday Diorama set features changeable scenery, allowing you to customize and create your own unique birthday party scene.
Can this LEGO set be given as a gift?
Yes, this LEGO Birthday Diorama set can be a wonderful gift to celebrate the birthday of a friend or loved one of any age, starting from 6 years old and above.
When was LEGO 40584 cheapest?
Since tracking began on 25/10/2026, the lowest shop price recorded by Brickfact for LEGO 40584 was £24.95 on 25/10/2026 at eBay, including shipping. Amazon prices are not included.
