Name: LEGO Birthday Diorama 40584
Brand: Lego
SKU: 40584
Price: 12.99 USD
Availability: InStock

A LEGO Birthday Diorama, set 40584, showcasing two minifigures, presents, balloons, and a 'Happy Birthday' sign against a colorful wall backdrop.

A Festive Build Display

This delightful LEGO set 40584, boasting 157 pieces, creates a vibrant birthday diorama that measures 3.5 inches tall. Notice the smart use of jumper plates to offset the "Happy Birthday" sign, giving it depth against the lilac wall. The minifigures, a party-goer with a top hat and a cameraman, are ready to celebrate. The colorful balloon builds are a great example of simple, effective brick sculpting.

$12.99

Earn 84 Points Worth ~$0.65 rewards

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Set # 40584

Released 2023

Pieces 157

Price / Piece 8.3¢

Figures 2

Age 6+

Scale & Brick Value Piece Volume & Pricing Ranks

Piece Rank #1259 Top 82% active

Historic Scale #6,511 Top 33% of 20,150

Part Efficiency #582 8.4¢/pc • Top 38%

Collector Insights Verified Oct 11, 2026

Includes 2 exclusive molds recorded across official inventories.

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Set 40584 Build Specifications & Overview

Complete build timeline, spatial dimensions, and display footprint analysis.

Value Breakdown

Est. Build Time (*Pieces per minute): Casual 1.3h 2 ppm*

AFOL (Avg) 0.6h 4 ppm*

Master Builder 0.4h 7 ppm*
Avg Price / Hour: $21.65/hr
Price Per Basic Brick: $0.02