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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.

The Dynamic Duo Funhouse Escape

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6857 The Dynamic Duo Funhouse Escape

359 pieces in 144 part and color combinations, plus 5 minifigures.

LEGO counts 380 pieces. This inventory comes from a separate parts catalog and lists 381, including the 22 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

Black 95 pieces

  • Antenna 1 x 4 with Flat Top Black Part 3957b Element 395726 ×2
  • Bar 1 x 8 x 3 - 1 x 8 x 4 Curved Black Part 95229 Element 6360199 or 4620385 ×2
  • Brick 1 x 6 Black Part 3009 Element 300926 ×2
  • Brick Arch 1 x 4 Black Part 3659 Element 365926 ×2
  • Brick Arch 1 x 6 Raised Arch Black Part 92950 Element 4620763 ×4
  • Brick Sloped Inverted 34° 3 x 1 with Internal Stopper Black Part 4287b ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×1
  • Equipment Radio [Extended Handle, Compact Speaker Grille] Black Part 3962b Element 396226 ×1
  • Fence Spindled 1 x 4 x 2 [2 Top Studs] Black Part 30055 Element 4185652 or 3005526 ×2
  • Handlebars Black Part 30031 Element 3003126 ×1
  • Hinge Cylinder 1 x 2 Locking with 2 Click Fingers and Axle Hole, 9 Teeth Black Part 30553 Element 4143372 ×3
  • Hinge Plate 1 x 2 Locking with 1 Finger On Top Black Part 30383 Element 6338799 or 4144575 ×2
  • Plate 1 x 1 Black Part 3024 Element 302426 ×4
  • Plate 1 x 4 Black Part 3710 Element 371026 ×4
  • Plate 1 x 6 Black Part 3666 Element 366626 ×4
  • Plate 2 x 4 Black Part 3020 Element 302026 ×2
  • Plate 2 x 6 Black Part 3795 Element 379526 ×1
  • Plate 2 x 8 Black Part 3034 Element 303426 ×1
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Black Part 4081b Element 6281993 or 4632571 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Black Part 60897 Element 6330189 or 4617547 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Black Part 3794a ×1
  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Black Part 2444 Element 244426 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Black Part 87580 Element 6663108 or 4565323 ×7
  • Plate Special 2 x 2 with Wheel Holders Black Part 4600 Element 460026 ×2
  • Seat / Chair 2 x 2 with Center Sprue Mark Black Part 4079b Element 407926 ×1
  • Stairs 7 x 4 x 6 Straight Open Black Part 30134 Element 4279270 or 4105288 ×1
  • String with End Studs 31L Overall Black Part 14226c31 Element 6510782 or 6096956 ×1
  • Technic Axle 6 Black Part 3706 Element 370626 ×1
  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×1
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×5
  • Technic Brick 1 x 4 [3 Pin Holes] Black Part 3701 Element 370126 ×1
  • Technic Pin Connector Plate with One Hole (Single on Bottom) Black Part 32529 Element 4144023 ×2
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 2 spares in the box ×10
  • Technic Rotation Joint Disk with Pin and 3L Beam Thick Black Part 44225 Element 4651566 ×4
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 Also in Dark Blue ×3
  • Tile Special 2 x 2 with Top Pin Black Part 2460 Element 4258354 or 246026 ×2
  • Tyre 30.4 x 14 Offset Tread [Centre Band] Black Part 92402 Element 4619323 ×2
  • Vehicle Track, Train, Plastic Narrow, Ramp 5 Bricks High Black Part 85977 Element 4655337 ×1
  • Vehicle Track, Train, Plastic, Narrow, Curve Black Part 85976 Element 4621929 ×1
  • Weapon Batarang Black Part 98721 Element 4650620 1 spare in the box ×1
  • Wedge Plate 3 x 6 Cut Corners Black Part 2419 Element 241926 ×1

Red 54 pieces

  • Brick 1 x 1 x 5 with Solid Stud Red Part 2453b Element 4212410 or 4188181 ×2
  • Brick 1 x 2 x 2 with Inside Stud Holder Red Part 3245c Element 4143832 ×4
  • Brick 1 x 2 x 5 with Blocked Open Studs and Bottom Stud Holder with Asymmetric Ridges Red Part 2454a ×4
  • Brick Curved 3 x 1 No Studs Red Part 50950 Element 4251162 ×2
  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Red Part 61409 Element 4540382 or 4535102 ×2
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Red Part 3660 Element 366021 ×2
  • Brick Special 1 x 1 with Stud on 1 Side Red Part 87087 Element 4558886 ×6
  • Panel 1 x 6 x 5 Red Part 59349 Element 6433222 or 6375480 ×3
  • Plate 1 x 4 Red Part 3710 Element 371021 ×2
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×2
  • Plate 2 x 4 Red Part 3020 Element 302021 ×2
  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 1 spare in the box ×1
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×3
  • Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top] Red Part 32530 Element 4207715 or 3253021 ×1
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×6
  • Tile 1 x 8 with Groove Red Part 4162 Element 416221 ×2
  • Tile 2 x 2 with Groove Red Part 3068b Element 306821 ×2
  • Tile 2 x 4 with Groove Red Part 87079 Element 4560179 ×1
  • Tile Round 2 x 2 with Bottom Cross Red Part 4150 Element 415071 or 415021 ×2
  • Tile Special 1 x 2 with Handle Red Part 2432 Element 243221 ×2
  • Tool Crowbar Red Part 92585 Element 4599453 ×1

Reddish Brown 40 pieces

  • Brick 1 x 1 Reddish Brown Part 3005 Element 4211242 ×4
  • Brick 1 x 2 x 5 with Blocked Open Studs and Bottom Stud Holder with Asymmetric Ridges Reddish Brown Part 2454a ×2
  • Brick 1 x 6 Reddish Brown Part 3009 Element 4211193 ×4
  • Brick 2 x 2 Reddish Brown Part 3003 Element 4211210 ×12
  • Brick Arch 1 x 12 x 3 Reddish Brown Part 6108 Element 4584719 ×2
  • Brick Arch 1 x 5 x 4 [Irregular Bow, Raised Underside Cross Supports] Reddish Brown Part 76768 Element 6012805 ×2
  • Brick Arch 1 x 6 Raised Arch Reddish Brown Part 92950 Element 4655611 ×1
  • Plate 2 x 6 Reddish Brown Part 3795 Element 4211247 ×2
  • Plate 4 x 4 Reddish Brown Part 3031 Element 4243838 or 4225868 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Reddish Brown Part 87580 Element 4565394 ×1
  • Technic Axle Connector Smooth [with x Hole + Orientation] Reddish Brown Part 59443 Element 4531751 ×2
  • Tile 1 x 2 with Groove Reddish Brown Part 3069b Element 4211151 ×6
  • Tile 1 x 4 with Groove Reddish Brown Part 2431 Element 4211194 ×1

Green 30 pieces

  • Brick 1 x 2 Green Part 3004 Element 4107736 or 300428 ×10
  • Brick 1 x 4 Green Part 3010 Element 4112838 or 301028 ×1
  • Brick Sloped 33° 3 x 1 Green Part 4286 Element 4107637 or 428628 ×3
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Green Part 3660 Element 4142717 ×2
  • Cone 1 x 1 [Top Groove] Green Part 59900 Element 4529239 ×4
  • Flag 4 x 1 Wavy [First Wave Right] Green Part 4495b Element 6268947 or 449528 ×2
  • Plate 1 x 2 Green Part 3023 Element 302328 ×2
  • Plate 1 x 4 Green Part 3710 Element 371028 ×4
  • Wedge Plate 4 x 2 Left Green Part 41770 Element 4543262 or 4161334 ×1
  • Wedge Plate 4 x 2 Right Green Part 41769 Element 4543259 or 4160871 ×1

Light Bluish Gray 25 pieces

  • Equipment Handcuffs Light Bluish Gray Part 61482 Element 6173615 or 4641048 1 spare in the box ×1
  • Hat, Bowler with Black Question Mark Print Light Bluish Gray Part 95674pr0002 Element 6019115 or 4655431 ×1
  • Plate Special 1 x 2, Top Clip [Split] Light Bluish Gray Part 92280 Element 4598526 ×1
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×1
  • Technic Brick 1 x 6 [5 Pin Holes] Light Bluish Gray Part 3894 Element 4211466 ×2
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×2
  • Technic Pin Connector Round Curved with Fin and Hole Light Bluish Gray Part 87745 Element 4659731 ×2
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×4
  • Technic Steering Wheel Small (3 Studs Diameter) Light Bluish Gray Part 2819 Element 4580510 or 4211578 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Light Bluish Gray Part 2412b Element 4211350 ×8
  • Wheel 18 x 14 with Pin Hole, Fake Bolts and Shallow Spokes Light Bluish Gray Part 55981 Element 6109684 or 4299119 ×2

Dark Purple 20 pieces

  • Barrel 4 x 4 x 3.5 Dark Purple Part 30139 Element 4650752 ×1
  • Plate 2 x 3 Dark Purple Part 3021 Element 4225142 ×1
  • Plate Round 1 x 1 with Solid Stud Dark Purple Part 6141 Element 4566522 2 spares in the box ×14
  • Tile 1 x 2 with Groove Dark Purple Part 3069b Element 4613192 ×4

White 19 pieces

  • Brick Arch 1 x 3 x 2 White Part 88292 Element 4568956 ×2
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top White Part 6091 Element 6285777 or 609101 ×4
  • Brick Curved 2 x 4 x 1 1/3 White Part 6081 Element 608151 or 608101 ×1
  • Cone 3 x 3 x 2 White Part 6233 Element 6188466 or 4655446 ×2
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] White Part 2654 Element 6601843 or 6552259 ×1
  • Plate Special 4 x 4, Studs on One Edge Plain] White Part 6179 Element 6550149 or 617901 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] White Part 3701 Element 6601913 or 370101 ×2
  • Tile Round 2 x 2 with Bottom Cross White Part 4150 Element 415051 or 415001 ×1
  • Train Wheel Small, hole notched for wheels holder pin White Part 50254 Element 4655619 ×4

Dark Bluish Gray 16 pieces

  • Plate 6 x 8 Dark Bluish Gray Part 3036 Element 4210794 ×1
  • Plate Special 4 x 6 with Trap Door Hinge [Long Pins] Dark Bluish Gray Part 92099 Element 4595710 ×1
  • Plate Special 6 x 8 Trap Door Frame Horizontal [Long Pin Holders] Dark Bluish Gray Part 92107 Element 4595708 ×1
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×1
  • Technic Axle 5.5 with Stop [Rounded Short End] Dark Bluish Gray Part 59426 Element 4508553 ×3
  • Technic Axle 8 with Stop Dark Bluish Gray Part 55013 Element 4499858 ×1
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Dark Bluish Gray Part 32064a Element 6178919 or 4210935 ×3
  • Technic Gear 8 Tooth Dark Bluish Gray Part 3647 Element 4514559 1 spare in the box ×1
  • Tile 1 x 4 with Groove Dark Bluish Gray Part 2431 Element 4211053 ×4

Trans-Green 15 pieces

  • Brick Round 1 x 1 Open Stud Trans-Green Part 3062b Element 6514234 or 6238046 ×7
  • Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 2 spares in the box ×8

Yellow 14 pieces

  • Bracket 1 x 2 - 1 x 4 [Rounded Corners] Yellow Part 10201 Element 6076799 ×1
  • Brick Special 1 x 2 with Grille Yellow Part 2877 Element 287724 ×2
  • Brick Special 1 x 4 with 4 Studs on One Side Yellow Part 30414 Element 4164073 or 3041424 ×2
  • Technic Axle Connector with Axle Hole Yellow Part 32039 Element 4107800 or 3203924 ×1
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 2 spares in the box ×8

Flat Silver 9 pieces

  • Animal, Fish [Hollow Stud Mouth] Flat Silver Part 64648 Element 4611885 ×1
  • Plate Round 1 x 1 with Solid Stud Flat Silver Part 6141 Element 4633691 1 spare in the box ×4
  • Tile Special 1 x 2 with Handle Flat Silver Part 2432 Element 4614461 ×4

Dark Blue 6 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Blue Part 54200 Element 4504374 or 4502092 1 spare in the box ×2
  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) Dark Blue Part 3794b Element 4186627 ×2
  • Tile 1 x 2 with Groove Dark Blue Part 3069b Element 6554190 or 4528488 Also in Black ×1
  • Wedge Plate 2 x 4 Dark Blue Part 51739 Element 4613335 or 4251895 ×1

Dark Tan 3 pieces

  • Plate 6 x 12 Dark Tan Part 3028 Element 4266897 ×3

Blue 2 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×2

Dark Brown 2 pieces

  • Brick Special 1 x 2 Palisade [aka Log] Dark Brown Part 30136 Element 4519970 ×2

Dark Green 2 pieces

  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Dark Green Part 6091 Element 6411352 or 4588024 ×2

Trans-Purple 2 pieces

  • Cone 1 x 1 [Top Groove] Trans-Purple Part 59900 Element 6514023 or 6337603 ×2

[No Color/Any Color] 2 pieces

  • Comic Book, Super Heroes, DC Universe, Issue 1 (6004121 / 6005844) [No Color/Any Color] Part 6004121 ×1
  • Sticker Sheet for Set 6857-1 [No Color/Any Color] Part 75012 Element 4659242 ×1

Light Nougat 1 piece

  • Minifig Head Riddler, Purple Eyemask, Open Mouth Smirk Print [Hollow Stud] Light Nougat Part 3626cpr0900 Element 4652494 ×1

Orange 1 piece

  • Brick and Axle Separator v2.0 Orange Part 96874 Element 6240515 or 4654448 ×1

Trans-Clear 1 piece

  • Panel 1 x 2 x 3 [Side Supports / Hollow Studs] Trans-Clear Part 87544 Element 6507949 or 6211814 ×1

Minifigures 5 figures

  • The Joker Minifigure, checked as a whole figure ×1
  • Robin with Black Eyemask Minifigure, checked as a whole figure ×1
  • Harley Quinn in Jester Outfit Minifigure, checked as a whole figure ×1
  • The Riddler with Light Bluish Gray Hat Minifigure, checked as a whole figure ×1
  • Batman, Light Bluish Gray Suit, Dark Blue Cape and 10113 Cowl 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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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.

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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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