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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.

Ariel's Crystal Cavern

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43254 Ariel's Crystal Cavern

144 pieces in 96 part and color combinations, plus 2 minifigures.

LEGO counts 141 pieces. This inventory comes from a separate parts catalog and lists 152, including the 8 parts inside the minifigures; the two do not always count the same elements, so their totals differ. 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.

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

Yellow 19 pieces

  • Animal, Fish with Large Eyes, Medium Blue Dorsal and Tail Fin and Blue Stripes on Top Print (Flounder / Fabius) Yellow Part 15679pr0002 Element 6382590 ×1
  • Animal, Sea Life Set, Clam Shell Large Yellow Part 49595b ×1
  • Animal, Sea Life Set, Clam Shell Small Yellow Part 49595d ×2
  • Animal, Sea Life Set, Fish with Bar Yellow Part 49595e ×2
  • Animal, Sea Life Set, Octopus Yellow Part 49595a ×1
  • Animal, Sea Life Set, Seahorse with Bar Yellow Part 49595g ×2
  • Animal, Sea Life Set, Snail with Bar Yellow Part 49595f ×2
  • Animal, Sea Life Set, Star Fish Yellow Part 49595c ×2
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×1
  • Brick 1 x 4 Yellow Part 3010 Element 301024 ×1
  • Flag 4 x 1 Wavy [First Wave Right] Yellow Part 4495b Element 6268959 or 6250272 ×1
  • Plate 2 x 2 Yellow Part 3022 Element 4613978 or 302224 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Yellow Part 87580 Element 6126050 or 4565386 ×1
  • Slide Curved Left 90° Yellow Part 28387 Element 6252376 or 6177206 ×1

Dark Turquoise 15 pieces

  • Brick 1 x 4 Dark Turquoise Part 3010 Element 6217660 ×1
  • Brick Curved 2 x 1 with Inverted Cutout Dark Turquoise Part 78666 Element 6431332 ×2
  • Brick Curved Inverted 2 x 2 with 1 x 2 Cutouts Dark Turquoise Part 1750 Element 6439043 ×2
  • Brick Round, Curved 2 x 2 x 1 1/3, Corner Dark Turquoise Part 67810 Element 6393823 ×2
  • Brick Special 1 x 1 with Stud on 1 Side Dark Turquoise Part 87087 Element 6213781 ×2
  • Brick Special 1 x 2 with 1 Center Stud on 1 Side, Bottom Stud Holder Dark Turquoise Part 86876 Element 6489749 ×1
  • Plate 1 x 4 Dark Turquoise Part 3710 Element 6350418 or 4121705 Also in Medium Azure ×1
  • Plate 2 x 8 Dark Turquoise Part 3034 Element 6257063 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Dark Turquoise Part 15573 Element 6210399 ×1
  • Plate Special 2 x 2 with Double Inverted Curve, 1 Stud Dark Turquoise Part 4190 Element 6508338 ×2

Black 11 pieces

  • Brick Special 1 x 2 with 1 Center Stud on 1 Side, Bottom Stud Holder Black Part 86876 Element 6475339 ×2
  • Curled Decorative Ornament / Plant Vine with Bar Black Part 28870 Element 6286835 ×2
  • Equipment Magnifying Glass with Thick Frame, Hollow Handle, Trans-Clear Lens Pattern Black Part 38648pat0001 Element 6499140 or 6325525 ×1
  • Equipment Pot / Cauldron 3 x 3 x 1 & 3/4 with Handles Black Part 4341 Element 4525078 or 434126 ×1
  • Plate Special 1 x 4 with Wheels Holder Black Part 2926 Element 6338416 or 292626 ×2
  • Tile Round 1 x 1 with White Dot/Circle/Eye Print Black Part 98138pr0107 Element 6284072 or 6253831 ×2
  • Tile Round 1 x 2 Half Circle Black Part 1748 Element 6510071 or 6420852 ×1

Reddish Brown 11 pieces

  • Antenna 1 x 4 with Flat Top Reddish Brown Part 3957b Element 4538252 ×1
  • Book Binding with Two Studs Reddish Brown Part 24324 Element 6167879 or 6134672 ×1
  • Book Cover [Plain] Reddish Brown Part 24093 Element 6174229 or 6134673 ×1
  • Brick Sloped 45° 2 x 1 with 2/3 Inverted Cutout and no stud Reddish Brown Part 28192 Element 6248854 ×2
  • Plate 1 x 4 Reddish Brown Part 3710 Element 4211190 ×2
  • Plate 2 x 4 Reddish Brown Part 3020 Element 4211186 ×2
  • Tile 2 x 3 Reddish Brown Part 26603 Element 6311441 ×1
  • Wedge Plate 3 x 4 with Stud Notches [Reinforced Underside] Reddish Brown Part 90194 Element 6170527 or 4649052 ×1

Trans-Dark Pink 11 pieces

  • Brick 1 x 2 x 5 without Side Supports Trans-Dark Pink Part 46212 Element 6514087 or 6252586 ×2
  • Brick Round 2 x 2 with Axle Hole Trans-Dark Pink Part 3941 Element 6514288 or 6296852 ×4
  • Dish 2 x 2 Inverted [Radar] Trans-Dark Pink Part 4740 Element 6580376 or 6245302 ×1
  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Dark Pink Part 30153 Element 6513975 or 6247796 ×1
  • Rock Panel 2 x 4 x 6 Trans-Dark Pink Part 47847 Element 6507897 or 6397578 ×2
  • Tile Round 1 x 1 Trans-Dark Pink Part 98138 Element 6514196 or 6274745 ×1

Trans-Light Blue 9 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Trans-Light Blue Part 3040b Element 6507937 or 6373578 ×2
  • Panel 1 x 2 x 1 [Rounded Corners] Trans-Light Blue Part 4865b Element 6514122 or 6246890 ×2
  • Plate 1 x 2 Trans-Light Blue Part 3023 Element 6514007 or 6240222 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Trans-Light Blue Part 87580 Element 6499141 or 6443647 ×3

Medium Azure 8 pieces

  • Brick Curved 4 x 1 Double, No Studs Medium Azure Part 93273 Element 6097093 ×1
  • Glass for Frame 1 x 6 x 7 with Bow with Medium Nougat Mirror, Pearl Chains, Dark Pink Crystals Print Medium Azure Part 65066pr9998 Element 6538364 or 6481737 ×1
  • Plate 1 x 4 Medium Azure Part 3710 Element 6603965 or 6070757 Also in Dark Turquoise ×1
  • Plate 2 x 4 Medium Azure Part 3020 Element 6603317 or 6013826 ×1
  • Plate 4 x 4 Medium Azure Part 3031 Element 6141594 ×1
  • Plate Round Corner 6 x 6 Medium Azure Part 6003 Element 6133693 ×2
  • Plate Special 8 x 9 x 2/3 with 1 x 4 Recessed Medium Azure Part 15624 Element 6476962 or 6252375 ×1

Coral 7 pieces

  • Animal Body Part, Clam / Scallop Half Shell with 4 Studs Coral Part 18970 Element 6287639 ×1
  • Plant, Plate 1 x 1 Round with 3 Leaves Coral Part 32607 Element 6375789 ×2
  • Wheel 8 x 6 with Slot Coral Part 34337 Element 6310372 ×4

Lavender 7 pieces

  • Brick 1 x 2 Lavender Part 3004 Element 6099352 or 6015118 ×2
  • Brick 1 x 6 Lavender Part 3009 Element 6424639 or 6097869 ×1
  • Brick Sloped 33° 3 x 1 Lavender Part 4286 Element 6491249 or 6070295 ×2
  • Panel 1 x 6 x 7 with 2 Columns and Arch Lavender Part 40066 Element 6343761 ×1
  • Plant, Stem with 3 Leaves and Bottom Pin Lavender Part 37695 Element 6466042 ×1

White 6 pieces

  • Animal Body Part, Clam / Scallop Half Shell with 4 Studs White Part 18970 Element 6550156 or 6097097 ×1
  • Bracket 1 x 2 - 2 x 2 Inverted White Part 99207 Element 6552151 or 6548279 ×1
  • Brick Sloped 45° 2 x 1 with 2/3 Inverted Cutout and no stud White Part 28192 Element 6552164 or 6166894 ×1
  • Fence Ornamented 1 x 4 x 2 with 4 Studs White Part 19121 Element 6097236 ×1
  • Plate Special 1 x 2 [Side Handle Closed Ends] White Part 48336 Element 6552125 or 4222017 ×1
  • Turntable 2 x 2 Plate, Light Bluish Gray Top [Complete Assembly] White Part 3680c02 Element 6472047 or 4226289 ×1

Medium Nougat 5 pieces

  • Brick Arch 1 x 4 x 2 Medium Nougat Part 6182 Element 6174192 or 4569470 ×2
  • Brick Sloped Inverted 45° 4 x 1 Double with 1 x 2 Recessed Medium Nougat Part 32802 Element 6487913 ×1
  • Brick Wedged, Sloped Inverted 6 x 4 with 4 Stud Connections Medium Nougat Part 4856b Element 6487912 ×1
  • Container Box 2 x 2 x 1 Reinforced Bottom Medium Nougat Part 2821 Element 6435640 ×1

Trans-Bright Green 5 pieces

  • Brick Round 2 x 2 with Axle Hole Trans-Bright Green Part 3941 Element 6549515 or 6514287 ×5

Bright Green 4 pieces

  • Bar Holder with Clip Bright Green Part 11090 Element 6405702 ×1
  • Plant, Sea Grass Bright Green Part 30093 Element 6269992 or 6210746 ×3

Dark Purple 4 pieces

  • Plate 2 x 4 Dark Purple Part 3020 Element 6030277 or 4589625 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Purple Part 87580 Element 6446090 or 6126086 ×3

Light Aqua 4 pieces

  • Brick Curved 2 x 2 x 2/3 Light Aqua Part 15068 Element 6210729 or 6138658 ×1
  • Plate 1 x 2 Light Aqua Part 3023 Element 6146701 or 6015054 ×2
  • Plate 2 x 4 Light Aqua Part 3020 Element 6138662 or 6014539 ×1

Lime 4 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Lime Part 2412b Element 6263442 or 4537921 ×4

Medium Lavender 3 pieces

  • Plate 8 x 8 with Rounded End Medium Lavender Part 41948 Element 6490227 or 6250119 ×1
  • Treasure Chest Bottom with Rear Slots, No Groove Medium Lavender Part 4738c Element 6056226 ×1
  • Treasure Chest Lid [Thick Hinge] Medium Lavender Part 4739a Element 6254219 or 6167678 ×1

Opal Trans-Clear 2 pieces

  • Brick Round 1 x 1 Open Stud Opal Trans-Clear Part 3062b Element 6514239 or 6363601 ×2

Tan 2 pieces

  • Plate Round Corner 6 x 6 Tan Part 6003 Element 6056484 or 4288370 ×1
  • Tile 1 x 2 with Parchment, Flask, Notes Print Tan Part 3069bpr9972 Element 6481741 ×1

Flat Silver 1 piece

  • Equipment Cutlery - Fork Flat Silver Part 79741 Element 6361354 ×1

Glitter Trans-Purple 1 piece

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

Opal Trans-Dark Pink 1 piece

  • Cloud / Dust with Bar Opal Trans-Dark Pink Part 68547 Element 6514393 or 6447569 ×1

Opal Trans-Purple 1 piece

  • Rock 1 x 1 Crystal 5 Point Opal Trans-Purple Part 30385 Element 6507866 or 6442192 ×1

Pearl Gold 1 piece

  • Fence Lattice 1 x 4 x 1 Pearl Gold Part 3633 Element 4536675 ×1

Trans-Clear 1 piece

  • Equipment Bottle / Erlenmeyer Flask with Trans-Bright Green Fluid Pattern Trans-Clear Part 93549pat0001 Element 6530023 or 6447576 ×1

Yellowish Green 1 piece

  • Flower 4 x 4 Rounded Petals with Center Stud Yellowish Green Part 35473 Element 6487914 ×1

Minifigures 2 figures

  • Ariel - Mermaid Form, Live Action Movie Minidoll, Red Hair Minifigure, checked as a whole figure ×1
  • Ursula - Dark Purple, Minidoll Minifigure, checked as a whole figure ×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.

Request a replacement from LEGO

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