BlockTalk Find Your Set

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LEGO Missing Piece Checker

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.

LearnToLearn Core set

Checking

45120 LearnToLearn Core set

2,018 pieces in 51 part and color combinations.

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.

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Piece checklist

Bricks 728 pieces

  • Brick 1 x 1 Blue Part 3005 Element 300523 ×56
  • Brick 2 x 2 Blue Part 3003 Element 4103589 or 300373 ×56
  • Brick 1 x 1 Green Part 3005 Element 300528 ×56
  • Brick 1 x 2 Green Part 3004 Element 4107736 or 300428 ×56
  • Brick 2 x 2 Green Part 3003 Element 300328 ×56
  • Brick 1 x 1 Orange Part 3005 Element 4173805 or 4119645 ×56
  • Brick 1 x 2 Orange Part 3004 Element 4613981 or 4121739 ×56
  • Brick 2 x 2 Orange Part 3003 Element 4153825 or 4119643 ×56
  • Brick 1 x 1 Red Part 3005 Element 300521 ×56
  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×56
  • Brick 1 x 1 with Simple Black Eye with White Pupil Print White Part 3005pr0003 Element 4569080 ×56
  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×56
  • Brick 2 x 2 Yellow Part 3003 Element 4103588 or 300374 ×56

Bricks Sloped 280 pieces

  • Brick Sloped 45° 2 x 2 Blue Part 3039 Element 303923 ×56
  • Brick Sloped 45° 2 x 2 Green Part 3039 Element 303928 ×56
  • Brick Sloped 45° 2 x 2 Orange Part 3039 Element 4118828 ×56
  • Brick Sloped 45° 2 x 2 Red Part 3039 Element 303921 ×56
  • Brick Sloped 45° 2 x 2 Yellow Part 3039 Element 303924 ×56

Plates 196 pieces

  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×28
  • Plate 2 x 4 Green Part 3020 Element 302028 ×28
  • Plate 8 x 8 Light Bluish Gray Part 41539 Element 4166618 ×28
  • Plate 2 x 4 Orange Part 3020 Element 4158355 or 4122468 ×28
  • Plate 2 x 4 Red Part 3020 Element 302021 ×28
  • Plate 1 x 10 White Part 4477 Element 6552113 or 6550148 ×28
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×28

Bricks Round and Cones 168 pieces

  • Brick Round 2 x 2 with Axle Hole Blue Part 3941 Element 614373 or 614323 ×28
  • Brick Round 2 x 2 with Axle Hole Dark Purple Part 3941 Element 4622176 ×28
  • Brick Round 2 x 2 with Axle Hole Green Part 3941 Element 4251378 or 4239200 ×28
  • Brick Round 2 x 2 with Axle Hole Orange Part 3941 Element 4141089 ×28
  • Brick Round 2 x 2 with Axle Hole Red Part 3941 Element 614321 or 394121 ×28
  • Brick Round 2 x 2 with Axle Hole Yellow Part 3941 Element 614324 or 394124 ×28

Technic Bricks 168 pieces

  • Technic Brick 1 x 2 [1 Pin Hole] Blue Part 3700 Element 370023 ×56
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×56
  • Technic Brick 1 x 2 [1 Pin Hole] Yellow Part 3700 Element 370024 ×56

Bars, Ladders and Fences 56 pieces

  • Bar 4L (Lightsaber Blade / Wand) Reddish Brown Part 30374 Element 6116613 or 4262974 ×56

Energy Effects 56 pieces

  • Wave / Flame Rounded with Base Rim Trans-Light Blue Part 6126b Element 6167739 ×28
  • Wave / Flame Rounded with Base Pegs Trans-Neon Orange Part 6126a ×28

Hinges, Arms and Turntables 56 pieces

  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×28
  • Turntable 2 x 2 Plate - Top Light Bluish Gray Part 3679 Element 4540203 or 4495467 ×28

Minifig Heads 56 pieces

  • Minifig Head, Black Eyebrows, Thin Grin, Eyes with White Pupils Print [Hollow Stud] Yellow Part 3626cpr0891 Element 4651441 ×28
  • Minifig Head, Thin Eyebrows, Eyelashes, White Pupils and Peach Lips Smile Print Yellow Part 3626cpr1580 Element 6100203 ×28

Minifig Headwear 56 pieces

  • Hat / Cap Short Curved Peak Lime Part 86035 Element 4567911 or 4457911 ×28
  • Hat / Cap Short Curved Peak Orange Part 86035 Element 4583147 ×28

Minifig Lower Body 56 pieces

  • Hips and Green Legs Green Part 970c31 Element 6177344 or 6020793 ×28
  • Hips and Orange Legs Orange Part 970c34 Element 6329305 or 4602964 ×28

Minifig Upper Body 56 pieces

  • Torso, Blue Arms, Yellow Hands [Plain] Blue Part 973c28h01 Element 4275815 or 73837 ×28
  • Torso, Red Arms, Yellow Hands [Plain] Red Part 973c22h01 Element 4582740 or 4275872 ×28

Bricks Special 28 pieces

  • Brick Special 1 x 2 with Pin Dark Bluish Gray Part 2458 Element 4211087 ×28

Plates Round Curved and Dishes 28 pieces

  • Plate Round 4 x 4 with Pin Hole Bright Light Blue Part 60474 Element 4599545 ×28

Technic Connectors 28 pieces

  • Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top] Black Part 32530 Element 4144024 ×28

Tools 2 pieces

  • Brick and Axle Separator v2.0 Orange Part 96874 Element 6240515 or 4654448 ×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.

Request a replacement from LEGO

Buy the piece

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.

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