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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.

Hopsy's Castle Game

Checking

10450 Hopsy's Castle Game

47 pieces in 34 part and color combinations.

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.

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Piece checklist

Duplo, Quatro and Primo 45 pieces

  • Duplo Brick 1 x 2 x 2 with Bottom Tube Lavender Part 76371 Element 6139513 ×2
  • Duplo Brick 2 x 2 Lavender Part 3437 Element 4654789 ×2
  • Duplo Brick 2 x 2 Slope 45° with Medium Lavender Scallops Print Lavender Part 6474pr9969 Element 6546723 ×3
  • Duplo Building Roof Spire 3 x 3 x 3 Lavender Part 16375 Element 6532213 ×1
  • Duplo Flag Wavy 3 x 4 with Post Lavender Part 31925 Element 6532216 ×1
  • Duplo Animal Squirrel with Coral, Black, and White Eyes Print Medium Azure Part 18115pr0004 Element 6546724 ×1
  • Duplo Brick 2 x 2 x 2 with Castle Window Print Medium Azure Part 31110pr9974 Element 6546725 ×3
  • Duplo Brick 2 x 4 Medium Azure Part 3011 Element 6136982 ×2
  • Duplo Brick 2 x 4 Curved Top Medium Azure Part 98223 Element 6167668 ×1
  • Duplo Cone 2 x 2 Square Base Medium Azure Part 47408 Element 6252014 ×1
  • Duplo Door / Window Frame Flat Front Surface, Completely Open Back Medium Azure Part 61649 Element 6137113 ×1
  • Duplo Door / Window, Castle Medium Azure Part 16598 Element 6532217 or 6135525 ×1
  • Duplo Plate 4 x 4 Medium Azure Part 14721 Element 6532220 ×1
  • Duplo Animal Rabbit, Arms Wide, Black Eye, White Pupil Print Red Part 111546pr0001 Element 6546727 ×1
  • Duplo Arrow Red Part 5931 Element 6530689 ×1
  • Duplo Brick 2 x 3 with Curved Bottom Red Part 98252 Element 6073864 ×2
  • Duplo Brick 2 x 4 Red Part 3011 Element 4583326 or 4290074 ×3
  • Duplo Brick 2 x 4 Curved Top Red Part 98223 Element 4648243 ×1
  • Duplo Door / Window Frame Flat Front Surface, Completely Open Back Red Part 61649 Element 4595169 or 4529256 ×1
  • Duplo Door / Window, Castle Red Part 16598 Element 6531215 ×1
  • Duplo Flag Wavy 3 x 4 with Post Red Part 31925 Element 6536312 ×1
  • Duplo Plate 4 x 4 Red Part 14721 Element 6070650 ×1
  • Duplo Brick Round 2 x 2 Studs, Thin Disc White Part 5966 Element 6530687 ×1
  • Duplo Animal Cat / Kitten Looping Tail, Eyes and Mouth Print Yellow Part 104931pr0002 Element 6546726 ×1
  • Duplo Brick 1 x 4 x 2 with 2 Top Cutouts (Arrow Slits) Yellow Part 16685 Element 6250858 or 6071250 ×1
  • Duplo Brick 2 x 2 Yellow Part 3437 Element 4583546 or 343724 ×2
  • Duplo Brick 2 x 4 Yellow Part 3011 Element 4290060 or 301124 ×3
  • Duplo Brick 2 x 4 x 2 Arch Yellow Part 11198 Element 6213652 ×1
  • Duplo Door / Window Frame Flat Front Surface, Completely Open Back Yellow Part 61649 Element 4595171 or 4541213 ×1
  • Duplo Door / Window, Castle Yellow Part 16598 Element 6548845 ×1
  • Duplo Plate 4 x 4 Yellow Part 14721 Element 6151299 ×1
  • Duplo Plate 6 x 12 Yellowish Green Part 4196 Element 6532215 ×1

Gear Parts 1 piece

  • Playmat, Duplo, for Set 10450-1 [No Color/Any Color] Part 111619 Element 6529875 ×1

Non-System Parts 1 piece

  • Disc for Duplo Spinner with Number Print White Part 111618 Element 6529873 ×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.

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