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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.

Windows of Creativity

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11004 Windows of Creativity

450 pieces in 153 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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Black 44 pieces

  • Brick 2 x 2 Black Part 3003 Element 4103587 or 300326 Also in Dark Blue ×2
  • Brick Curved 2 x 2, Two Top Studs Black Part 30165 Element 4200023 or 4113231 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Black Part 54200 Element 4504382 or 4287159 1 spare in the box ×3
  • Brick Special 1 x 1 Studs on 4 Sides Black Part 4733 Element 473326 ×1
  • Plate 1 x 2 Black Part 3023 Element 302326 ×4
  • Plate 1 x 8 Black Part 3460 Element 346026 ×2
  • Plate 2 x 4 Black Part 3020 Element 302026 ×4
  • Plate 2 x 8 Black Part 3034 Element 303426 ×2
  • Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Black Part 3839b Element 383926 ×2
  • Plate Special 1 x 2 with Handles on Ends Black Part 18649 Element 6099483 ×2
  • Plate Special 1 x 4 with Wheels Holder Black Part 2926 Element 6338416 or 292626 ×2
  • Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L Black Part 32828 Element 6196548 1 spare in the box ×4
  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×1
  • Tyre 15 x 6 Offset Tread Small with Band around Center Black Part 87414 Element 4578677 ×4
  • Wheel Skateboard / Trolley Black Part 2496 Element 6223673 or 4569104 ×2
  • Window 1 x 2 x 2 2/3 Pane Lattice Diamond with Rounded Top Black Part 30046 Element 6173105 or 3004626 ×2
  • Window 2 x 4 x 3 Frame with Hollow Studs Black Part 60598 Element 6231575 ×2
  • Window Pane Latticed 1 x 2 x 2 Black Part 38320 Element 6477141 or 6234994 ×3

White 43 pieces

  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×4
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×4
  • Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×4
  • Brick Arch 1 x 6 x 2 - Thin Top without Reinforced Underside [New Version] White Part 15254 Element 6548280 or 6106183 ×2
  • Cone 2 x 2 x 2, Open Stud White Part 3942c Element 6044601 or 6022158 ×1
  • Creature Body Part, Horn (Unicorn) White Part 89522 Element 6192793 or 6156242 1 spare in the box ×2
  • Door 1 x 4 x 5 Train Left White Part 4181 Element 6210107 or 6117843 ×1
  • Door Frame 1 x 4 x 4, Holes (Lift) White Part 6154 Element 4599974 ×1
  • Door Frame 1 x 4 x 6 Type 2 White Part 60596 Element 6262945 or 4541956 ×2
  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] White Part 60470b Element 6347287 or 4556152 ×2
  • Tile Round 1 x 1 with Black Eye Closed with Eyelashes Print White Part 98138pr0026 Element 6284604 or 6097402 1 spare in the box ×3
  • Tile Round 1 x 1 with Black Eye with Off-Side Pupil Partially Closed Print White Part 98138pr0027 Element 6284605 or 6099548 1 spare in the box ×3
  • Tile Round 1 x 1 with Offset Black Eye Print White Part 98138pr0008 Element 6284599 or 6029156 1 spare in the box ×2
  • Tile Round 1 x 1 with Squinted Eye, Top Side Pupil Print White Part 98138pr0062 Element 6285616 or 6173629 1 spare in the box ×2
  • Wheel 8 x 6 with Slot White Part 34337 Element 6194809 1 spare in the box ×4
  • Window 1 x 2 x 2 2/3 with Rounded Top White Part 30044 Element 6619297 or 4247139 ×2
  • Window 1 x 2 x 2 Flat Front White Part 60592 Element 6550187 or 6382045 ×2
  • Window 1 x 2 x 3 Flat Front White Part 60593 Element 6468341 or 4536521 ×2

Red 30 pieces

  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×8
  • Brick 2 x 3 Red Part 3002 Element 300271 or 300221 ×4
  • Brick 2 x 4 Red Part 3001 Element 300121 ×4
  • Brick Curved 2 x 2 x 2/3 Red Part 15068 Element 6105976 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Red Part 3040b Element 4121934 or 304021 ×4
  • Brick Sloped 45° 2 x 2 Red Part 3039 Element 303921 ×4
  • Plate 2 x 4 Red Part 3020 Element 302021 ×2
  • Plate 4 x 4 Red Part 3031 Element 4243814 or 303121 ×2

Yellow 30 pieces

  • Bracket 1 x 2 - 2 x 2 Yellow Part 44728 Element 6117938 or 4615642 ×2
  • Brick 1 x 2 x 2 with Inside Stud Holder Yellow Part 3245c Element 4121625 ×4
  • Brick 1 x 4 Yellow Part 3010 Element 301024 ×8
  • Brick Round 2 x 2 x 1 1/3 Inverted Yellow Part 24947 Element 6145704 ×1
  • Brick Special 1 x 1 with Stud on 1 Side Yellow Part 87087 Element 4624985 ×2
  • Door 1 x 4 x 6 with 4 Panes and Stud Handle Yellow Part 60623 Element 4528550 ×1
  • Panel 1 x 4 x 1 with Rounded Corners [Thin Wall] Yellow Part 15207 Element 6092648 ×2
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×2
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×2
  • Window 1 x 2 x 2 Plane, Hollow Studs, Single Hole Top and Bottom for Glass Yellow Part 60032 Element 6249279 or 6153842 ×2
  • Window 1 x 2 x 3 Pane with Thick Corner Tabs Yellow Part 60608 Element 6171059 or 4528136 ×4

Dark Orange 28 pieces

  • Brick 1 x 1 Dark Orange Part 3005 Element 6254484 or 6000643 ×6
  • Brick 1 x 2 Dark Orange Part 3004 Element 4579659 or 4164441 ×12
  • Brick Arch 1 x 4 Dark Orange Part 3659 Element 6441766 or 6212897 ×2
  • Brick Curved 1 x 3 x 2 Dark Orange Part 33243 Element 6058088 ×4
  • Brick Sloped 30° 1 x 2 x 2/3 Dark Orange Part 85984 Element 6188477 or 4666350 ×4

Tan 28 pieces

  • Brick 1 x 2 Tan Part 3004 Element 4109995 or 300405 ×4
  • Brick 2 x 2 Tan Part 3003 Element 4114306 or 300305 ×4
  • Brick Curved 2 x 2, Two Top Studs Tan Part 30165 Element 6174929 or 4113230 ×2
  • Brick Round 1 x 1 Open Stud Tan Part 3062b Element 4117070 or 306205 ×4
  • Brick Special 1 x 1 with Stud on 1 Side Tan Part 87087 Element 4579260 ×4
  • Brick Special 1 x 2 with Masonry Brick Profile Tan Part 98283 Element 6148262 ×4
  • Plate 2 x 2 Tan Part 3022 Element 4114084 or 302205 ×4
  • Window 1 x 2 x 2 Plane, Hollow Studs, Single Hole Top and Bottom for Glass Tan Part 60032 Element 4543947 ×2

Light Bluish Gray 22 pieces

  • Brick 1 x 1 x 5 with Solid Stud Light Bluish Gray Part 2453b Element 4211362 ×2
  • Brick Curved 2 x 2 x 2/3 Light Bluish Gray Part 15068 Element 6102357 ×4
  • Brick Round 2 x 2 Truncated Cone Light Bluish Gray Part 98100 Element 6028324 ×4
  • Door 1 x 4 x 4 Lift Light Bluish Gray Part 6155 Element 6169980 or 4618324 ×1
  • Plate 6 x 12 Light Bluish Gray Part 3028 Element 4211400 ×1
  • Turntable 2 x 2 Plate - Top Light Bluish Gray Part 3679 Element 4540203 or 4495467 ×1
  • Wheel Holder, Plate, Round 2 x 2 Thin with Clips Light Bluish Gray Part 2655 Element 6152344 or 4211373 ×2
  • Window 1 x 2 x 2 2/3 with Rounded Top Light Bluish Gray Part 30044 Element 4523353 or 4211627 ×3
  • Window 1 x 2 x 2 Castle Light Bluish Gray Part 90195 Element 4642934 or 4583689 ×4

Green 21 pieces

  • Brick 1 x 3 Green Part 3622 Element 4109679 or 362228 ×4
  • Brick 2 x 2 Green Part 3003 Element 300328 ×4
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Green Part 3660 Element 4142717 ×4
  • Cone 1 x 1 [Top Groove] Green Part 59900 Element 4529239 ×2
  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Green Part 24866 Element 6135287 1 spare in the box ×3
  • Plate 4 x 12 Green Part 3029 Element 4279059 or 302928 ×1
  • Plate 6 x 8 Green Part 3036 Element 4507311 or 303678 ×1
  • Window 1 x 2 x 2 Flat Front Green Part 60592 Element 6382730 or 6170767 ×2

Blue 19 pieces

  • Brick 1 x 4 Blue Part 3010 Element 301023 ×4
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Blue Part 11477 Element 6055065 ×4
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×4
  • Plate 4 x 4 Blue Part 3031 Element 4243815 or 303123 ×1
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Blue Part 60478 Element 6073890 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Blue Part 87580 Element 6126049 or 4565319 ×2
  • Window 1 x 4 x 3 without Shutter Tabs Blue Part 60594 Element 6097556 or 4597415 ×2

Reddish Brown 17 pieces

  • Brick 1 x 4 Reddish Brown Part 3010 Element 4211225 ×4
  • Brick Arch 1 x 3 x 3 [Gothic] Reddish Brown Part 13965 Element 6055086 ×2
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Reddish Brown Part 3747b Element 4508616 or 4217916 ×4
  • Plate 4 x 8 Reddish Brown Part 3035 Element 4211207 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Reddish Brown Part 2412b Element 4224243 ×4
  • Window 1 x 2 x 2 2/3 Shutter with Rounded Top Reddish Brown Part 94161 Element 6424037 or 4624507 ×2

Dark Azure 16 pieces

  • Brick Sloped 30° 1 x 2 x 2/3 Dark Azure Part 85984 Element 6151663 ×4
  • Brick Special 1 x 1 with Handle Dark Azure Part 2921 Element 6170573 or 6152103 ×4
  • Brick Special 1 x 1 with Stud on 1 Side Dark Azure Part 87087 Element 6004938 ×4
  • Plate Special 1 x 2 with Clip Horizontal on Side Dark Azure Part 11476 Element 6313118 or 6151674 ×2
  • Window 1 x 2 x 2 Flat Front Dark Azure Part 60592 Element 6382731 or 6251822 ×2

Dark Pink 15 pieces

  • Brick 1 x 1 Dark Pink Part 3005 Element 4492224 or 4245297 ×4
  • Brick 1 x 3 Dark Pink Part 3622 Element 6602935 or 4618655 ×4
  • Brick 2 x 2 Dark Pink Part 3003 Element 4517992 or 4497170 ×4
  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Dark Pink Part 24866 Element 6209679 1 spare in the box ×3

Orange 15 pieces

  • Brick Sloped 45° 2 x 2 Orange Part 3039 Element 4118828 ×10
  • Brick and Axle Separator v2.0 Orange Part 96874 Element 6240515 or 4654448 ×1
  • Plate 2 x 6 Orange Part 3795 Element 4121741 ×2
  • Tile 2 x 2 with Groove Orange Part 3068b Element 4542142 or 4125268 ×2

Trans-Clear 15 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Clear Part 3065 Element 6514262 or 6244904 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Clear Part 54200 Element 6245250 or 4244362 1 spare in the box ×3
  • Door 1 x 4 x 6 Smooth with Chamfered Handle Plinth Trans-Clear Part 60616b Element 6514119 or 6247362 ×1
  • Glass for Window 1 x 2 x 2 Flat Trans-Clear Part 60601 Element 6673770 or 6524697 ×3
  • Glass for Window 1 x 2 x 3 Flat Front Trans-Clear Part 60602 Element 6581359 or 6252258 ×2
  • Plate 1 x 2 Trans-Clear Part 3023 Element 6514001 or 6240204 ×4

Magenta 13 pieces

  • Brick Sloped 33° 3 x 2 Magenta Part 3298 Element 4599547 ×8
  • Plate 1 x 4 Magenta Part 3710 Element 6037652 ×4
  • Plate 2 x 12 Magenta Part 2445 Element 6093863 ×1

Lime 11 pieces

  • Brick Special 1 x 1 with Stud on 1 Side Lime Part 87087 Element 6073026 or 4566860 ×4
  • Plate 1 x 2 Lime Part 3023 Element 4164037 or 4122439 ×4
  • Plate 2 x 2 Lime Part 3022 Element 4613977 or 4537937 ×3

Bright Pink 10 pieces

  • Brick 1 x 2 Bright Pink Part 3004 Element 4517993 or 4245296 ×4
  • Brick 1 x 4 Bright Pink Part 3010 Element 4518890 ×4
  • Brick Arch 1 x 4 Bright Pink Part 3659 Element 6175307 ×2

Dark Blue 10 pieces

  • Brick 2 x 2 Dark Blue Part 3003 Element 4296785 or 4264580 Also in Black ×2
  • Brick Sloped 45° 2 x 2 Dark Blue Part 3039 Element 4153653 ×2
  • Brick Sloped 45° 2 x 2 Double Convex Dark Blue Part 3045 Element 4196736 ×2
  • Brick Sloped 75° 2 x 2 x 2 Quadruple Convex Dark Blue Part 3688 Element 6153589 or 4614791 ×4

Dark Bluish Gray 10 pieces

  • Brick 1 x 2 Dark Bluish Gray Part 3004 Element 4211088 ×4
  • Brick 1 x 2 x 5 with Hollow Studs Dark Bluish Gray Part 2454b Element 4211075 ×2
  • Brick Arch 1 x 4 Dark Bluish Gray Part 3659 Element 4210999 ×2
  • Brick Special 2 x 2 with Grooves and Axle Hole Dark Bluish Gray Part 90258 Element 6236949 or 4583879 ×2

Dark Purple 8 pieces

  • Brick 1 x 2 Dark Purple Part 3004 Element 6104154 or 4640739 ×4
  • Brick 1 x 4 Dark Purple Part 3010 Element 6185995 or 4640611 ×4

Medium Azure 8 pieces

  • Brick 1 x 2 Medium Azure Part 3004 Element 6603336 or 6092674 ×4
  • Brick 1 x 4 Medium Azure Part 3010 Element 6603319 or 6036238 ×4

Medium Lavender 8 pieces

  • Brick Curved 1 x 1 x 2/3 Double Curved Top, No Studs Medium Lavender Part 49307 Element 6261546 ×2
  • Door 1 x 2 x 3 with Vertical Handle, Round Handle Holes on Back Medium Lavender Part 60614 Element 6138507 ×4
  • Plate 2 x 4 Medium Lavender Part 3020 Element 4619516 ×2

Dark Tan 6 pieces

  • Brick 2 x 4 Dark Tan Part 3001 Element 4497066 or 4247145 ×4
  • Plate 2 x 6 Dark Tan Part 3795 Element 4550329 ×2

Medium Nougat 4 pieces

  • Brick Special 1 x 2 Palisade [aka Log] Medium Nougat Part 30136 Element 4651231 ×4

Trans-Green 4 pieces

  • Glass for Window 1 x 2 x 2 Flat Trans-Green Part 60601 Element 6605294 or 6254567 ×4

Glitter Trans-Purple 2 pieces

  • Cone 1 x 1 [Top Groove] Glitter Trans-Purple Part 59900 Element 6514025 or 6337632 ×2

Lavender 2 pieces

  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Lavender Part 24866 Element 6214235 1 spare in the box ×2

Pearl Gold 2 pieces

  • Window 1 x 2 x 2 2/3 Pane Lattice Diamond with Rounded Top Pearl Gold Part 30046 Element 6173106 or 4541895 ×2

Sand Green 2 pieces

  • Window 1 x 4 x 1 2/3 with Spoked Rounded Top Sand Green Part 20309 Element 6138738 ×2

Trans-Neon Orange 2 pieces

  • Brick Round 2 x 2 with Axle Hole Trans-Neon Orange Part 3941 Element 6273156 or 611647 ×2

Trans-Red 2 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×2

Trans-Yellow 2 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 1 spare in the box ×2

Trans-Light Blue 1 piece

  • Glass for Train Door Lip On All Sides Trans-Light Blue Part 35157 Element 6244883 ×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.

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