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.

Soft Brick Activity Set

Checking

9023 Soft Brick Activity Set

14 pieces in 10 part and color combinations.

LEGO counts 7 pieces. This inventory comes from a separate parts catalog and lists 14; the two do not always count the same elements, so their totals differ. 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

Green 6 pieces

  • Brick Soft 2 x 2 Green Part 29540 Element 4238366 or 4121807 ×2
  • Brick Soft 2 x 4 Green Part 29541 Element 4238367 or 4121804 ×1
  • Duplo Brick 2 x 2 Green Part 3437 Element 6528078 or 4583552 ×2
  • Duplo Brick 2 x 4 Green Part 3011 Element 4290071 or 301128 ×1

Red 4 pieces

  • Brick Soft 2 x 2 Red Part 29540 Element 4238349 or 4121548 ×2
  • Duplo Brick 2 x 2 Red Part 3437 Element 4583321 or 343721 ×2

Blue 2 pieces

  • Brick Soft 2 x 2 Blue Part 29540 Element 4238357 or 4121808 ×1
  • Duplo Brick 2 x 2 Blue Part 3437 Element 343723 ×1

Yellow 2 pieces

  • Brick Soft 2 x 2 with Eye Print Yellow Part 29540pr0001 Element 4121550 ×1
  • Duplo Brick 2 x 2 with Eye with White Spot Print, on Two Sides - Type 1 Yellow Part 3437pr0067 Element 82061 ×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.