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 Figure Bob / Pageboy Hair Black, with Medium Blue Legs, Magenta Top, Brown EyesMagentaPart 75121pr0002Element 4667658 or 4598699×1
Duplo Figure with Cap Red, with Tan Top under Blue Coveralls with Red Pocket Flap - Blue LegsTanPart 63710pr0003Element 4596034 or 4529970×1
Duplo Figure Child with Cap Lime, with White Shirt under Blue Coveralls with worms in Pocket - Blue LegsWhitePart 47511pr0001Element 6233829 or 4651115×1
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.