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.

Build and Play in the Pop-Up 100 Acre Wood

Checking

2979 Build and Play in the Pop-Up 100 Acre Wood

15 pieces in 13 part and color combinations.

LEGO counts 13 pieces. This inventory comes from a separate parts catalog and lists 15; 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

Red 3 pieces

  • Duplo Brick 2 x 2 Red Part 3437 Element 4583321 or 343721 ×1
  • Duplo Fence 1 x 6 x 2 Red Part 31021 Element 4223923 or 4143326 ×1
  • Duplo Plant, Flower with 1 Top Stud Red Part 6510 Element 4100774 ×1

Blue 2 pieces

  • Duplo Plate 2 x 4 x 1/2 with 4 Center Studs [Thick] Blue Part 6413 Element 4205752 or 4143581 ×2

Dark Orange 2 pieces

  • Duplo Brick 2 x 2 x 2 with Indented Sides (Tree Trunk) Dark Orange Part 31061 Element 4100841 ×1
  • Duplo Fishing Rod and Hook with Red Line Dark Orange Part 23146 Element 4590448 or 4520294 ×1

Green 2 pieces

  • Duplo Brick 2 x 4 Green Part 3011 Element 4290071 or 301128 ×2

Purple 2 pieces

  • Duplo Brick 2 x 4 x 2 Curved Top with 'Winnie the Pooh' / Tree with Apples Print Purple Part 31213pr9999 ×1
  • Duplo Plant, Flower with 1 Top Stud Purple Part 6510 Element 4121749 ×1

Yellow 2 pieces

  • Duplo Animal Fish with Thin Tail and Large Tail Fin Yellow Part 31445 Element 4143234 ×1
  • Duplo Plate 4 x 8 Yellow Part 4672 Element 6465940 or 6278979 ×1

Light Orange 1 piece

  • Duplo Figure Bear, with Red Shirt Print (Winnie the Pooh) Light Orange Part dupfig0017 ×1

[No Color/Any Color] 1 piece

  • Duplo Book, Build and Play Pop-up Backdrop [No Color/Any Color] Part 4131275 Element 4131275 ×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.