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.

Stack 'n' Learn Smile Collection

Checking

3652 Stack 'n' Learn Smile Collection

17 pieces in 11 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.

Show

Piece checklist

Duplo, Quatro and Primo 17 pieces

  • Primo Brick 1 x 1 Blue Part 31000 Element 4142220 or 4112265 ×3
  • Primo Brick 1 x 2 Blue Part 31001 Element 4142223 or 4112258 ×1
  • Primo Brick 1 x 1 Green Part 31000 Element 4142222 or 4112267 ×3
  • Primo Brick 1 x 1 with Round Rattle, Frog Print Green Part 31005pr0006 Element 4214732 or 4214724 ×1
  • Primo Brick 1 x 1 Red Part 31000 Element 4223135 or 4142219 ×2
  • Primo Brick 1 x 1 with Round Rattle, Ladybug / Ladybird Print Red Part 31005pr0001 Element 4214737 or 4214726 ×1
  • Primo Brick 1 x 2 Red Part 31001 Element 4142226 or 4112261 ×1
  • Primo Brick 1 x 1 Yellow Part 31000 Element 4225981 or 4142221 ×1
  • Primo Brick 1 x 1 with Lego Logo Print Yellow Part 31000pr0001 Element 4142212 or 4108056 ×2
  • Primo Brick 1 x 1 with Round Rattle, Bee Print Yellow Part 31005pr0002 Element 4214719 or 4158397 ×1
  • Primo Brick 1 x 2 Yellow Part 31001 Element 4142225 or 4112260 ×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.