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.
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Bright Light YellowPart 54200Element 62964981 spare in the box×4
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Dark PinkPart 54200Element 6127601 or 60578941 spare in the box×4
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Medium LavenderPart 54200Element 6510324 or 64907721 spare in the box×4
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)WhitePart 54200Element 6550179 or 45043691 spare in the box×2
Bars, Ladders and Fences
12 pieces
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]GreenPart 3484Element 6541878×6
Bar 2L with Stop in CenterReddish BrownPart 78258Element 64510022 spares in the box×6
Bricks Round and Cones
12 pieces
Brick Round, Curved Triple 1 x 4 x 1Bright Light YellowPart 4045Element 6591783×2
Cone 1 x 1 [Top Groove]GreenPart 59900Element 4529239×4
Brick Round Curved 1 x 1 x 1 Quarter DomeWhitePart 5848Element 6575549×6
Bricks Wedged
8 pieces
Brick Wedged, Curved 2 x 1 with Stud Notch LeftBright Light YellowPart 29120Element 6296500×4
Brick Wedged, Curved 2 x 1 with Stud Notch RightBright Light YellowPart 29119Element 6296509×4
Tiles
8 pieces
Tile 1 x 1 with GrooveBright Light YellowPart 3070bElement 62758771 spare in the box×2
Tile 2 x 2 with GrooveBright Light YellowPart 3068bElement 6554800 or 6286832×2
Tile 1 x 1 with GrooveDark PinkPart 3070bElement 61337261 spare in the box×2
Tile 1 x 1 with GrooveMedium LavenderPart 3070bElement 60973011 spare in the box×2
Bricks
6 pieces
Brick 1 x 1Bright Light YellowPart 3005Element 6022084 or 6014502×2
Brick 1 x 1Medium AzurePart 3005Element 6603285 or 4619652×2
Brick 1 x 1Yellowish GreenPart 3005Element 6567035 or 6172766×2
Bricks Special
6 pieces
Brick Special 1 x 1 x 1 2/3 with 6 Studs on 3 SidesDark PinkPart 7729Element 6574782×6
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.