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.
LEGO counts 85 pieces. This inventory comes from a separate parts catalog and lists 86; 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.
Duplo Brick 2 x 2 x 1 1/2 with CurveReddish BrownPart 11169Element 6391784×5
Duplo Brick 2 x 3 x 2 with Curved TopReddish BrownPart 11344Element 6251702×1
Duplo Door / Window Frame Flat Front Surface, Completely Open BackReddish BrownPart 61649Element 6390997 or 6210754×2
Duplo Plant Tree Trunk 4 x 10 x 4 with Two BranchesReddish BrownPart 84191Element 6393601×1
Duplo Brick 2 x 2Trans-Light BluePart 3437Element 6507900 or 6201835×1
Duplo Brick 2 x 2 Slope 45°Trans-Light BluePart 6474Element 6511038 or 6295975×1
Duplo Animal Rabbit with Head Raised and Pink Nose PrintWhitePart 17684pr0001Element 6255014×1
Duplo Animal Bird with White Chest and Orange Beak PrintYellowPart 27370pr0005Element 6250014 or 6174302×1
Duplo Brick 2 x 2 x 2 Curved Top with Beehive PrintYellowPart 3664pr9991Element 6386673×1
Duplo Flower 4 x 4 x 1 with 4 Top StudsYellowish GreenPart 15515Element 6391043×2
Duplo Round Rock / Bush / Space Crater 4 x 4 x 1.5 with 2 x 2 HoleYellowish GreenPart 23742Element 6391782×1
Non-System Parts
1 piece
Backdrop, Duplo European Forest Scenery, for Set 10979-1[No Color/Any Color]Part 6405727Element 6405727×1
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.
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.