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.
Duplo Brick 2 x 4 x 2 Cloud with HolesMedium AzurePart 79784Element 6375986×1
Duplo Brick 2 x 4 Curved TopMedium NougatPart 98223Element 6386994×2
Duplo Brick Round 2 x 2 x 2Medium NougatPart 98225Element 6296138×1
Duplo Brick 2 x 4 x 2 Rounded Ends with Black Ladybug Dots PrintRedPart 4198pr0024Element 6420885×1
Duplo Brick Round 4 x 4 Dome Top with 2 x 2 Studs with Black Face, Smiling PrintRedPart 98220pr0001Element 6519714 or 6420870×1
Duplo Brick Round 4 x 4 with 4 StudsRedPart 2354Element 6421356×1
Duplo Brick Round 4 x 4 x 1 1/2, Curved BottomRedPart 1970Element 6421354×1
Duplo Plant, Flower with 1 Top StudsRedPart 84195Element 6387973×1
Duplo Plate Round 4 x 8 Semi-CircleReddish BrownPart 29304Element 6214593×2
Duplo Brick 2 x 2 x 1 1/2 with Curved Top, Rainbow on Left Side PrintWhitePart 11170pr0013Element 6330516×1
Duplo Brick 2 x 2 x 1 1/2 with Curved Top, Rainbow on Right Side PrintWhitePart 11170pr0014Element 6330517×1
Duplo Brick 2 x 3 with Curved Top with Light Bluish Grey Insect Wing PrintWhitePart 2302pr0021Element 6420887×2
Duplo Brick 2 x 4 Curved Bottom with Beehive PrintWhitePart 98224pr0010Element 6420890×1
Duplo Brick 2 x 4 x 2 Curved Top with Beehive, Bee PrintWhitePart 31213pr0033Element 6420889×1
Duplo Brick 2 x 4 Curved Bottom with Black Lines (Bee) PrintYellowPart 98224pr0011Element 6420888×1
Duplo Brick 2 x 4 x 2 Rounded Ends with Face, Open Mouth, Dark Pink Cheeks PrintYellowPart 4198pr0025Element 6420886×1
Duplo Brick 2 x 2Yellowish GreenPart 3437Element 6209859 or 4648235×1
Duplo Brick 2 x 4 Curved TopYellowish GreenPart 98223Element 6294207×2
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.
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.