BlockTalk Find Your Set

The Workshop Sheet 10 of 22

LEGO Missing Piece Checker

Enter a set number, mark each piece found or missing, and leave with a list of what is missing, the element IDs LEGO asks for and links to buy the parts. It is free and needs no account. Rule out the usual hiding places first.

Computer Science & AI K-2 Replacement Pack

Checking

45545 Computer Science & AI K-2 Replacement Pack

189 pieces in 49 part and color combinations, plus 4 minifigures.

The piece count includes the 12 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

White 38 pieces

  • Brick 1 x 2 x 2 with Black Eye, White Iris Print White Part 3245cpr0010 Element 6610034 ×8
  • Brick 1 x 6 White Part 3009 Element 6552097 or 6548259 ×4
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×4
  • Brick 2 x 8 White Part 3007 Element 6619309 or 6033776 ×2
  • Brick Round 2 x 2 [Grill] White Part 92947 Element 6615536 or 4650644 ×4
  • Plate 2 x 12 White Part 2445 Element 6552091 or 244501 ×4
  • Technic Brick 2 x 4 with 4 Pin Holes, 2 Pins White Part 112174 Element 6598035 ×2
  • Tile 2 x 6 White Part 69729 Element 6552183 or 6550182 ×2
  • Wheel Rim 24 x 7 with Black Tyre White Part 74214 Element 6639402 ×8

Dark Turquoise 30 pieces

  • Brick 2 x 2 Dark Turquoise Part 3003 Element 6314091 or 4120399 ×4
  • Brick 2 x 4 Dark Turquoise Part 3001 Element 6249422 or 6235115 ×4
  • Brick Curved 1 x 2 x 1 No Studs Dark Turquoise Part 37352 Element 6584235 or 6345262 ×8
  • Brick Round 1 x 1 Diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at Each End Dark Turquoise Part 25214 Element 6584242 ×4
  • Plant, Flower 2 x 2 Leaves - Angular Dark Turquoise Part 4727 Element 6490210 ×4
  • Plate 2 x 6 Dark Turquoise Part 3795 Element 6259794 or 4121503 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Dark Turquoise Part 3700 Element 6345402 or 4140338 ×4

Bright Light Orange 23 pieces

  • Brick 1 x 12 Bright Light Orange Part 6112 Element 6482740 ×2
  • Brick 2 x 2 Bright Light Orange Part 3003 Element 6295078 or 4645051 ×4
  • Brick 2 x 4 Bright Light Orange Part 3001 Element 6100027 or 4645053 ×4
  • Brick Curved 2 x 3 Bright Light Orange Part 6215 Element 6334834 ×8
  • Plate Round Corners 4 x 4 x 2/3 Circle with Reduced Knobs Bright Light Orange Part 66792 Element 6308882 ×2
  • Slide Straight 4 x 6 x 6 Bright Light Orange Part 27976 Element 6639098 or 6177209 ×1
  • Tile Special 2 x 3 Pentagonal Bright Light Orange Part 22385 Element 6340721 ×2

Coral 18 pieces

  • Brick 2 x 6 Coral Part 2456 Element 6422922 ×2
  • Brick Curved 1 x 3 x 2 Coral Part 33243 Element 6482750 ×2
  • Plant, Flower 2 x 2 - Round [Solid Stud] Coral Part 98262 Element 6639102 ×4
  • Plate Special 1 x 4 x 2/3 with 1 x 2 Bottom Cutout Coral Part 7769 Element 6598033 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Coral Part 32064a Element 6439447 ×4
  • Tile Round 2 x 4 Coral Part 66857 Element 6611550 ×4

Black 16 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×4
  • Brick Special 2 x 2 with Pin and Axle Hole Black Part 6232 Element 6365577 or 6070692 ×4
  • Brick Special 2 x 4 with 3 Axle Holes Black Part 39789 Element 6244917 ×4
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×4

Light Bluish Gray 14 pieces

  • Brick Special 2 x 4 with Pins Light Bluish Gray Part 6249 Element 6356158 or 4211676 ×4
  • Plate 2 x 8 Light Bluish Gray Part 3034 Element 4211406 ×4
  • Plate Round Corners 6 x 6 x 2/3 Circle with Reduced Knobs Light Bluish Gray Part 66789 Element 6299919 ×2
  • Plate Special 2 x 2 x 2/3 with Axle Hole and Grill on Sides (Haybale) Light Bluish Gray Part 71752 Element 6609654 ×4

Red 10 pieces

  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×4
  • Brick 2 x 4 Red Part 3001 Element 300121 ×4
  • Technic Axle 4 Red Part 3705 Element 6129995 or 4265797 ×2

Blue 8 pieces

  • Brick 2 x 2 Blue Part 3003 Element 4103589 or 300373 ×4
  • Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×4

Green 8 pieces

  • Brick 2 x 2 Green Part 3003 Element 300328 ×4
  • Brick 2 x 4 Green Part 3001 Element 4106356 or 300128 ×4

Medium Lavender 8 pieces

  • Brick 2 x 2 Medium Lavender Part 3003 Element 6545844 or 6070321 ×4
  • Brick 2 x 4 Medium Lavender Part 3001 Element 6013583 or 4655173 ×4

Trans-Yellow 8 pieces

  • Cone 1 x 1 [Top Groove] Trans-Yellow Part 59900 Element 6514022 or 6337597 ×8

Trans-Red 4 pieces

  • Rock 1 x 1 Crystal 5 Point Trans-Red Part 30385 Element 6507863 or 6236961 ×4

Yellow 4 pieces

  • Technic Axle 3 Yellow Part 4519 Element 6130007 ×4

Minifigures 4 figures

  • Monochrome Bright Green Minifigure, checked as a whole figure ×1
  • Monochrome Red, 28621 Head Minifigure, checked as a whole figure ×1
  • Monochrome Blue Minifigure, checked as a whole figure ×1
  • Monochrome Bright Light Orange, 28621 Head 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