BlockTalk Find Your Set

Free tool

LEGO Missing Piece Checker

Rule out the usual hiding places first. If the piece really is gone, check the set piece by piece and leave with the element ID LEGO asks for, or a link to buy the part.

Birthday Diorama

Checking

40584 Birthday Diorama

149 pieces in 56 part and color combinations, plus 2 minifigures.

The official piece count includes the 8 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Before you call it missing

Builders who report a missing piece often find it in one of these places. Tick each one off as you look.

Show

Piece checklist

Bricks 53 pieces

  • Brick 1 x 1 Bright Light Yellow Part 3005 Element 6022084 or 6014502 ×4
  • Brick 1 x 2 Bright Light Yellow Part 3004 Element 6022083 or 6014504 ×2
  • Brick 1 x 4 Bright Light Yellow Part 3010 Element 6036232 or 6014506 ×3
  • Brick 1 x 1 Dark Turquoise Part 3005 Element 6236772 or 6213776 ×8
  • Brick 1 x 1 x 5 with Solid Stud Dark Turquoise Part 2453b Element 6378056 or 6253875 ×3
  • Brick 1 x 1 Lavender Part 3005 Element 6097053 or 6015117 ×2
  • Brick 1 x 2 Lavender Part 3004 Element 6099352 or 6015118 ×5
  • Brick 1 x 4 Lavender Part 3010 Element 6097867 or 6097865 ×7
  • Brick 1 x 1 Medium Nougat Part 3005 Element 6057986 or 4569624 ×4
  • Brick 1 x 1 Orange Part 3005 Element 4173805 or 4119645 ×2
  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×8
  • Brick 1 x 1 x 5 with Solid Stud White Part 2453b Element 6550132 or 245301 ×3
  • Brick 1 x 3 White Part 3622 Element 6550143 or 362201 ×2

Plates 27 pieces

  • Plate 1 x 1 Bright Green Part 3024 Element 6401817 or 6223741 1 spare in the box ×3
  • Plate 2 x 2 Bright Pink Part 3022 Element 6096589 or 4245314 ×1
  • Plate 1 x 1 Coral Part 3024 Element 6258091 1 spare in the box ×3
  • Plate 1 x 8 Dark Bluish Gray Part 3460 Element 4210998 ×4
  • Plate 2 x 8 Dark Tan Part 3034 Element 4246957 ×1
  • Plate 4 x 8 Dark Tan Part 3035 Element 6006524 or 4246954 ×2
  • Plate 2 x 2 Dark Turquoise Part 3022 Element 6249390 or 4170141 ×2
  • Plate 1 x 2 Magenta Part 3023 Element 6103415 or 6020605 ×1
  • Plate 1 x 2 Medium Nougat Part 3023 Element 6218360 or 4645055 ×2
  • Plate 2 x 10 White Part 3832 Element 6552109 or 383201 ×1
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×4
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×3

Plates Special 22 pieces

  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Blue Part 61252 Element 6347291 or 4520946 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Bright Green Part 61252 Element 6347296 or 6172373 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Red Part 61252 Element 6335377 or 4524644 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Reddish Brown Part 87580 Element 4565394 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] White Part 61252 Element 6347293 or 4538353 ×2
  • Plate Special 1 x 2 [Side Handle Closed Ends] White Part 48336 Element 6552125 or 4222017 ×10
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Yellow Part 61252 Element 6347294 or 4540040 ×2

Bricks Round and Cones 12 pieces

  • Brick Round 2 x 2 Dome Top, Hollow Stud Dark Turquoise Part 30367c Element 6249559 ×1
  • Brick Round 2 x 2 Dome Bottom [Open Stud] Lime Part 15395 Element 6214557 or 6104128 ×1
  • Brick Round 2 x 2 Dome Top, Hollow Stud Lime Part 30367c Element 4279734 ×1
  • Brick Round 2 x 2 Dome Bottom [Open Stud] Medium Azure Part 15395 Element 6132411 ×1
  • Brick Round 1 x 1 Open Stud Reddish Brown Part 3062b Element 4211183 ×8

Bricks Special 8 pieces

  • Brick Special 1 x 1 with Stud on 1 Side Magenta Part 87087 Element 6267189 ×1
  • Brick Special 1 x 2 with Masonry Brick Profile Medium Nougat Part 98283 Element 4656783 ×2
  • Brick Special 1 x 4 with Masonry Brick Profile Medium Nougat Part 15533 Element 6055309 ×3
  • Brick Special 1 x 4 with 4 Studs on One Side White Part 30414 Element 6550167 or 4143254 ×2

Plates Round Curved and Dishes 8 pieces

  • Plate Round 1 x 1 Swirled Top Bright Pink Part 15470 Element 6424008 or 6060795 1 spare in the box ×4
  • Plate Round 4 x 4 with Pin Hole Medium Azure Part 60474 Element 6102828 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Medium Nougat Part 4032a Element 6167643 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Reddish Brown Part 4032a Element 4211159 ×2

Tiles 8 pieces

  • Tile 2 x 4 with Groove Medium Nougat Part 87079 Element 6218359 ×2
  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×4
  • Tile 2 x 4 with Groove White Part 87079 Element 6548271 or 4560178 ×2

Bricks Sloped 4 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Turquoise Part 54200 Element 6278172 1 spare in the box ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Magenta Part 54200 Element 6177349 1 spare in the box ×2

Bars, Ladders and Fences 2 pieces

  • Antenna 1 x 4 with Flat Top White Part 3957b Element 6550147 or 395701 ×2

Minifig Accessories 2 pieces

  • Equipment Camera Handheld with Central Viewfinder Lime Part 30089b Element 6476482 or 6185108 ×1
  • Equipment Candlestick White Part 37762 Element 6234807 ×1

Energy Effects 1 piece

  • Wave / Flame Small with Pin Trans-Orange Part 37775 Element 6514274 or 6357747 1 spare in the box ×1

Stickers 1 piece

  • Sticker Sheet for Set 40584-1 [No Color/Any Color] Part 10102247 Element 6425963 ×1

Supports, Girders and Cranes 1 piece

  • Support Round 2 x 2 x 2 Stand with Reinforced Underside Black Part 19798 Element 6106280 ×1

Minifigures 2 figures

  • Boy, White Shirt with Balloons, Dark Purple Top Hat Minifigure, checked as a whole figure ×1
  • Girl, Bright Pink Top, Short Tan Legs, Dark Azure Hair Minifigure, checked as a whole figure ×1

Tick each piece as you find it, or mark it missing.

When a piece really is missing

Ask LEGO

LEGO takes requests for pieces missing from a new set through its customer service site. The form asks for the set number and each piece's element ID, the number printed beside the piece in the parts list at the back of the instructions. This checker lists both.

Request a replacement from LEGO

Buy the piece

Mark a piece missing and your list links it to an eBay search for that part, which also covers pieces from older or second-hand sets.

Keep a record

Copy or download your missing list (the CSV opens in any spreadsheet), or print the whole checklist and tick pieces off on paper. Your marks stay in this browser, so you can check a big set over several sittings.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy