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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.

Science Kit Year 1-3

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45620 Science Kit Year 1-3

260 pieces in 67 part and color combinations, plus 6 minifigures.

The official piece count includes the 18 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

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

White 46 pieces

  • Animal Body Part, Clam / Scallop Half Shell with 4 Studs White Part 18970 Element 6550156 or 6097097 ×4
  • Brick 1 x 1 with Simple Black Eye with White Pupil Print White Part 3005pr0003 Element 4569080 ×10
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×4
  • Brick 2 x 4 White Part 3001 Element 6552094 or 300101 ×8
  • Brick Curved 1 x 2 x 1 No Studs White Part 37352 Element 6552172 or 6248827 ×4
  • Brick Curved Inverted 2 x 4 Double White Part 5174 Element 6461062 ×2
  • Brick Round, Half 1 x 2 White Part 68013 Element 6615561 or 6382983 ×4
  • Motor 10 x 6 x 3, Science White Part 118091 Element 6669513 or 6610998 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] White Part 3700 Element 6619284 or 370001 ×4
  • Tile Round 2 x 4 White Part 66857 Element 6329902 ×4
  • USB Cable White Part 114253 Element 6554054 ×1

Bright Light Orange 40 pieces

  • Brick 1 x 12 Bright Light Orange Part 6112 Element 6482740 ×4
  • Brick 1 x 4 Bright Light Orange Part 3010 Element 6003004 or 4490697 ×4
  • Brick Curved 2 x 3 Bright Light Orange Part 6215 Element 6334834 ×4
  • Brick Special 1 x 2 with 1 Center Stud on 1 Side, Bottom Stud Holder Bright Light Orange Part 86876 Element 6455791 ×4
  • Brick Special 2 x 2 with Photo Clip Bright Light Orange Part 5252 Element 6482579 ×2
  • Cone 1 x 1 [Top Groove] Bright Light Orange Part 59900 Element 6482736 ×10
  • Plant, Flower, Minifig Accessory with 7 Thick Petals and Pin, Center Ring Bright Light Orange Part 4367 Element 6452531 ×4
  • Plate 2 x 6 Bright Light Orange Part 3795 Element 6097509 ×4
  • Plate Round Corners 4 x 4 x 2/3 Circle with Reduced Knobs Bright Light Orange Part 66792 Element 6308882 ×4

Dark Turquoise 36 pieces

  • Brick 1 x 2 Dark Turquoise Part 3004 Element 6217659 or 4121500 ×8
  • Brick 1 x 8 Dark Turquoise Part 3008 Element 6289133 ×4
  • Brick 2 x 2 with Center Eye with White Print Dark Turquoise Part 3003pr0061 Element 6565252 ×4
  • Brick Special 2 x 4 with 3 Axle Holes Dark Turquoise Part 39789 Element 6482741 ×4
  • Brick and Axle Separator v2.0 Dark Turquoise Part 96874 Element 6254100 ×1
  • Cone 1 x 1 [Top Groove] Dark Turquoise Part 59900 Element 6482735 ×10
  • Plate 2 x 8 Dark Turquoise Part 3034 Element 6257063 ×4
  • Plate Round Corners 8 x 16 x 2/3 Circle with Reduced Knobs Dark Turquoise Part 5251 Element 6482578 ×1

Coral 31 pieces

  • Brick 2 x 2 Coral Part 3003 Element 6422920 ×4
  • Brick 2 x 4 Coral Part 3001 Element 6422921 or 6315988 ×8
  • Brick Curved 1 x 2 x 1 No Studs Coral Part 37352 Element 6261293 ×4
  • Brick Curved 1 x 3 x 2 Coral Part 33243 Element 6482750 ×4
  • Brick Curved 6 x 1 Coral Part 42022 Element 6482743 ×4
  • Helmet, Sports, with Vent Holes [Plain] Coral Part 46303 Element 6397831 ×1
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Coral Part 32064a Element 6439447 ×4
  • Wheel 43 x 14 with 4 Spokes, Axle Hole, and Black Integral Tire Coral Part 65834pat0001 Element 6482584 ×2

Medium Nougat 22 pieces

  • Brick 1 x 1 x 5 with Solid Stud Medium Nougat Part 2453b Element 6339311 or 6102979 ×4
  • Brick 2 x 2 Medium Nougat Part 3003 Element 6058085 or 4645062 ×4
  • Brick 2 x 2 x 3 Medium Nougat Part 30145 Element 6482742 ×4
  • Brick Special 1 x 2 with 2 Studs on 1 Side Medium Nougat Part 11211 Element 6411587 ×4
  • Plate Round Corners 8 x 8 x 2/3 Circle with Reduced Knobs Medium Nougat Part 66790 Element 6509766 or 6301649 ×2
  • Tile 1 x 6 with Groove Medium Nougat Part 6636 Element 6102995 ×4

Dark Blue 21 pieces

  • Brick 2 x 2 Dark Blue Part 3003 Element 4296785 or 4264580 ×4
  • Brick 2 x 4 Dark Blue Part 3001 Element 6275133 or 4530029 ×8
  • Brick 2 x 8 Dark Blue Part 3007 Element 6482811 or 4649966 ×4
  • Plate 2 x 12 Dark Blue Part 2445 Element 6218082 ×4
  • Plate Round Corners 8 x 16 x 2/3 Circle with Reduced Knobs Dark Blue Part 5251 Element 6531173 ×1

Black 14 pieces

  • Flexible Ribbed Hose 8mm Ends 10L Black Part 27328 Element 6454757 or 6253307 ×4
  • Plate Special 2 x 2 with Rubber Foot Black Part 109373 Element 6492701 ×4
  • String with End Studs 11L Overall Black Part 14226c11 Element 6096955 or 6037558 ×2
  • Wheel Smooth 24 x 14mm with Pin Hole Black Part 5253 Element 6482581 ×4

Bright Green 8 pieces

  • Plant, Flower 2 x 2 Leaves - Angular Bright Green Part 4727 Element 4143562 ×4
  • Plant, Grass Stem with Bar Hole [3.2mm] Bright Green Part 15279 Element 6566117 or 6413056 ×4

Light Bluish Gray 8 pieces

  • Brick Special 1 x 2 with Pin - Bottom Stud Holder Light Bluish Gray Part 44865 Element 6321770 ×4
  • Brick Special 2 x 4, with 2 x 2 Brick with Top Pin and 1 x 2 Side Plates Light Bluish Gray Part 30592 Element 6301425 or 6278504 ×2
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×2

Trans-Clear 6 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Clear Part 3065 Element 6514262 or 6244904 ×4
  • Dish 8 x 8 Inverted [Radar], Solid Studs, Squared Anti-stud Underside, Anti-Studs on Edges Trans-Clear Part 35154 Element 6514063 ×2

Dark Pink 4 pieces

  • Plant, Flower, Minifig Accessory with 7 Thick Petals and Pin, Center Ring Dark Pink Part 4367 Element 6452523 ×4

Tan 4 pieces

  • Plate Special 2 x 2 x 2/3 with Axle Hole and Grill on Sides (Haybale) Tan Part 71752 Element 6330903 ×4

Trans-Light Blue 4 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Light Blue Part 3065 Element 6514268 or 6244910 ×4

Trans-Red 4 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Red Part 3065 Element 6514263 or 6244905 ×4

Trans-Yellow 4 pieces

  • Brick Round 2 x 2 with Axle Hole Trans-Yellow Part 3941 Element 6514285 or 6273155 ×4

Yellow 4 pieces

  • Technic Axle 3 Yellow Part 4519 Element 6130007 ×2
  • Technic Axle 7 Yellow Part 44294 Element 6130009 ×2

Flat Silver 2 pieces

  • Flexible Ribbed Hose 8mm Ends 19L Flat Silver Part 57539 Element 6044636 or 4615232 ×2

Red 2 pieces

  • Technic Axle 10 Red Part 3737 Element 6130005 or 4267858 ×2

Minifigures 6 figures

  • Monochrome Bright Green Minifigure, checked as a whole figure ×1
  • Monochrome Red, 28621 Head Minifigure, checked as a whole figure ×1
  • Monochrome Blue Minifigure, checked as a whole figure ×1
  • Monochrome Bright Light Orange, 28621 Head Minifigure, checked as a whole figure ×1
  • White Torso, Dark Turquoise Legs, Neutral Face Minifigure, checked as a whole figure ×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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