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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.
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
LEGO's request form asks for the set number (10925) and each piece's element ID, both listed above.
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Duplo Brick 1 x 2 x 2 with Colorful Numbers (1 to 10) Print
×1
Duplo Cabinet 2 x 2 x 1.5
×1
Duplo Door / Window
×1
Duplo Food, Two Cakes on Plate Yellow
×1
Duplo Rocking Horse with Unicorn with Azure and Pink Mane and Tail Print
×1
Duplo Brick 1 x 2 x 2 with Bottom Tube
×1
Duplo Brick 2 x 2
×1
Duplo Brick 4 x 2 Double Slope 45°
×1
Duplo Figure Child, Hair Combed Forward with Curl Black, Light Aqua Legs, Bright Light Yellow Under Shirt, Jacket Print
×1
Duplo Balloons
×1
Duplo Brick 2 x 2 with Gift, with Ribbon, Bow, and Spots Print
×1
Duplo Figure Child with Bow on Short Bob Hair Bright Light Yellow, with White Legs, White Collar, and Colored Spots Print
×1
Duplo Chair with no Back / Stool
×2
Duplo Door / Window Frame Flat Front Surface, Completely Open Back
×1
Duplo Plate 4 x 8
×1
Duplo Drawer 2 x 2 with Pull Handle
×1
Tick each piece as you find it, or mark it missing.
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 LEGOMark 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.
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.
