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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.

Balancing & Stacking Tree

Checking

10440 Balancing & Stacking Tree

27 pieces in 19 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 27 pieces

  • Duplo Brick 2 x 2 Bright Green Part 3437 Element 4583789 or 4168579 ×3
  • Duplo Brick 2 x 4 x 2 Cloud with Holes Bright Green Part 79784 Element 6519716 ×1
  • Duplo Brick 2 x 2 x 2 Curved Top with Bright Light Yellow Sleeping Moon, Stars on Medium Azure Background / Bright Light Orange Smiling Sun with Cloud Print Bright Light Yellow Part 3664pr0031 Element 6522024 ×1
  • Duplo Egg, Bottom 4 x 4 x 1 3 / 4 Coral Part 5896 Element 6519659 ×1
  • Duplo Door / Window Frame Flat Front Surface, Completely Open Back Lavender Part 61649 Element 6482033 or 6099487 ×3
  • Duplo Egg, Bottom 4 x 4 x 1 3 / 4 Light Aqua Part 5896 Element 6519660 ×1
  • Duplo Brick 2 x 2 Lime Part 3437 Element 4183780 ×1
  • Duplo Brick 2 x 3 with Curved Bottom Lime Part 98252 Element 4655944 ×2
  • Duplo Brick 2 x 4 Lime Part 3011 Element 4290083 or 4166923 ×2
  • Duplo Plate 12 x 6 Rounded (Cloud) Lime Part 5897 Element 6519661 ×1
  • Duplo Brick 2 x 2 x 2 Curved Top with Sitting Bird, White Face with Closed Eyes, Bright Light Orange Feet Print Medium Azure Part 3664pr0032 Element 6522023 ×1
  • Duplo Egg, Top 4 x 4 x 2 1 / 2 Medium Azure Part 5895 Element 6519658 ×1
  • Duplo Brick 4 x 12 x 2 [Rocker] Medium Nougat Part 39927 Element 6519717 ×1
  • Duplo Door / Lid, Wood Effect Medium Nougat Part 98459 Element 6527917 or 6327079 ×2
  • Duplo Door / Window, Castle Medium Nougat Part 16598 Element 6519715 ×1
  • Duplo Brick 2 x 2 x 2 Curved Top with Sitting Bird, White Face with Open Eyes, Bright Light Orange Feet Print Red Part 3664pr0033 Element 6522022 ×1
  • Duplo Egg, Top 4 x 4 x 2 1 / 2 Red Part 5895 Element 6519657 ×1
  • Duplo Chair with no Back / Stool Yellow Part 65273 Element 6287579 ×1
  • Duplo Brick 2 x 4 Yellowish Green Part 3011 Element 6523037 or 4648232 ×2

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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