BlockTalk Find Your Set

Free tool

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.

Treehouse Adventures

Checking

31053 Treehouse Adventures

379 pieces in 118 part and color combinations, plus 2 minifigures.

The piece count includes the 8 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.

Show

Piece checklist

Reddish Brown 55 pieces

  • Brick 1 x 3 Reddish Brown Part 3622 Element 4245312 or 4211220 ×4
  • Brick 1 x 4 Reddish Brown Part 3010 Element 4211225 ×3
  • Brick 2 x 2 Corner Reddish Brown Part 2357 Element 4211200 ×4
  • Brick Arch 1 x 5 x 4 [Continuous Bow, Raised Underside Cross Supports] Reddish Brown Part 14395 Element 6044725 ×8
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Reddish Brown Part 54200 Element 4504376 or 4260486 1 spare in the box ×4
  • Brick Sloped 65° 2 x 1 x 2 Reddish Brown Part 60481 Element 4629736 ×8
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Reddish Brown Part 3660 Element 4211221 ×3
  • Cone 1 x 1 [Top Groove] Reddish Brown Part 59900 Element 4529242 ×2
  • Fence Spindled 1 x 4 x 2 [4 Top Studs] Reddish Brown Part 15332 Element 6066114 ×2
  • Plate 1 x 8 Reddish Brown Part 3460 Element 4216945 ×2
  • Plate 2 x 8 Reddish Brown Part 3034 Element 4211211 ×4
  • Plate Round 1 x 1 with Solid Stud Reddish Brown Part 6141 Element 4216581 1 spare in the box ×4
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Reddish Brown Part 4032a Element 4211159 ×4
  • Plate Special 4 x 6, Studs on 3 Edges Reddish Brown Part 6180 Element 6370000 or 6075218 ×1
  • Tile Special 2 x 3 with 2 Clips [Thick Open O Clips] Reddish Brown Part 30350b Element 4544525 or 4205467 ×2

Black 45 pieces

  • Brick Arch 1 x 3 x 2 Black Part 88292 Element 4581280 ×4
  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×7
  • Brick Special 1 x 1 Studs on 4 Sides Black Part 4733 Element 473326 ×2
  • Equipment Paint Roller Brush Handle Smooth Handle Black Part 34076 Element 6192778 ×1
  • Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 Black Part 64644 Element 4538456 ×1
  • Panel 1 x 2 x 2 [Side Supports / Hollow Studs] Black Part 87552 Element 4593678 ×2
  • Plate 1 x 1 Black Part 3024 Element 302426 1 spare in the box ×2
  • Plate 1 x 6 Black Part 3666 Element 366626 ×3
  • Plate 2 x 2 Black Part 3022 Element 302226 ×4
  • Plate 2 x 4 Black Part 3020 Element 302026 ×4
  • Plate Special 1 x 1 with Tooth Black Part 49668 Element 4273590 ×1
  • Plate Special 1 x 4 with 2 Studs, 3 Bottom Tubes Black Part 92593 Element 4599499 ×6
  • String with End Studs 11L Overall Black Part 14226c11 Element 6096955 or 6037558 ×1
  • Tile Special 1 x 1 with Clip with Rounded Edges Black Part 15712 Element 6335388 or 6066102 ×4
  • Tile Special 1 x 2 with Handle Black Part 2432 Element 243226 ×1
  • Tool Hammer / Mallet Large Black Part 4522 Element 452226 ×1
  • Wheel Skateboard / Trolley Black Part 2496 Element 6223673 or 4569104 ×1

Green 43 pieces

  • Animal, Frog Green Part 33320 Element 6171101 or 4157270 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Green Part 11477 Element 6047426 ×4
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Green Part 54200 Element 4546705 or 4503118 1 spare in the box ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Green Part 3040b Element 4121969 or 4109668 ×10
  • Plate 1 x 3 Green Part 3623 Element 4107758 or 362328 ×4
  • Plate 2 x 3 Green Part 3021 Element 302128 ×4
  • Plate 8 x 8 Green Part 41539 Element 4161677 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Green Part 4032a Element 403228 ×9
  • Plate Round Corner 3 x 3 Green Part 30357 Element 6062166 or 4541187 ×1
  • Wedge Plate 3 x 2 Right Green Part 43722 Element 4621947 or 4180510 ×4

Light Bluish Gray 40 pieces

  • Antenna 1 x 4 with Flat Top Light Bluish Gray Part 3957b Element 4211473 ×1
  • Brick Round 1 x 1 Open Stud Light Bluish Gray Part 3062b Element 4211412 ×4
  • Brick Special 1 x 2 with 2 Studs on 1 Side Light Bluish Gray Part 11211 Element 6015344 ×8
  • Brick Special 1 x 2 with Handle Light Bluish Gray Part 30236 Element 4211580 ×3
  • Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] Light Bluish Gray Part 73983 Element 6102769 or 4219256 ×2
  • Plate Special 1 x 2 5.9mm Towball Socket Light Bluish Gray Part 14418 Element 6414556 or 6338163 ×4
  • Plate Special 1 x 2 Side Handle [Free Ends] Light Bluish Gray Part 2540 Element 4211632 ×2
  • Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Light Bluish Gray Part 3839b Element 4211464 ×1
  • Plate Special 1 x 2 with Pin Hole Underneath Light Bluish Gray Part 18677 Element 6168633 or 6089147 ×2
  • Tap 1 x 1 without Hole in Spout Light Bluish Gray Part 4599b Element 4211503 1 spare in the box ×3
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×1
  • Technic Axle and Pin Connector Angled #5 - 112.5° Light Bluish Gray Part 32015 Element 6271347 or 4211551 ×1
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×3
  • Tile Round 1 x 1 Light Bluish Gray Part 98138 Element 6284071 or 4650260 1 spare in the box ×4
  • Wheel Holder, Plate, Round 2 x 2 Thin with Clips Light Bluish Gray Part 2655 Element 6152344 or 4211373 ×1

Dark Bluish Gray 39 pieces

  • Brick Sloped 30° 1 x 2 x 2/3 Dark Bluish Gray Part 85984 Element 4567887 ×4
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×8
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 ×3
  • Plate 2 x 3 Dark Bluish Gray Part 3021 Element 4211043 ×6
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Dark Bluish Gray Part 4032a Element 4211042 ×11
  • Plate Special 1 x 2 with End Towball Dark Bluish Gray Part 22890 Element 6370802 or 6338168 ×4
  • Technic Brick 1 x 2 [2 Pin Holes] Dark Bluish Gray Part 32000 Element 4210762 ×2
  • Technic Pin Connector Round 1L [Beam] Dark Bluish Gray Part 18654 Element 6100030 1 spare in the box ×1

Red 32 pieces

  • Brick 1 x 1 Red Part 3005 Element 300521 ×4
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×4
  • Brick Sloped 65° 2 x 1 x 2 Red Part 60481 Element 4515371 ×4
  • Bucket 1 x 1 x 1 Red Part 95343 Element 6003001 ×1
  • Cone 1 x 1 [Top Groove] Red Part 59900 Element 4529234 ×1
  • Plate 4 x 8 Red Part 3035 Element 303521 ×1
  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 1 spare in the box ×4
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Red Part 60897 Element 6337002 or 4588003 ×1
  • Plate Special 1 x 4 with 2 Studs, 3 Bottom Tubes Red Part 92593 Element 4631877 ×9
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×1
  • Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×1
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Red Part 32054 Element 4140806 or 4125198 ×1

Tan 29 pieces

  • Brick Special 1 x 1 with Studs on 2 Sides Tan Part 47905 Element 4213568 ×1
  • Brick Special 1 x 2 Palisade [aka Log] Tan Part 30136 Element 4218749 or 4114053 ×8
  • Plate 1 x 3 Tan Part 3623 Element 4121921 or 362305 ×4
  • Plate 1 x 6 Tan Part 3666 Element 4124067 or 366605 ×4
  • Plate Special 1 x 2 [Side Handle Closed Ends] Tan Part 48336 Element 4217562 ×2
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×1
  • Tile 1 x 2 with Groove Tan Part 3069b Element 4114026 ×3
  • Tile 1 x 4 with Groove Tan Part 2431 Element 4550324 or 4542398 ×4
  • Tile 1 x 8 with Groove Tan Part 4162 Element 4544139 or 4519964 ×1
  • Tile 2 x 2 with Map River, Dark Tan Mountains, Handwriting and Red X Print Tan Part 3068bpr0139 Element 4524449 ×1

Dark Green 15 pieces

  • Plate Round Corner 3 x 3 Dark Green Part 30357 Element 6001836 ×11
  • Tile 2 x 2 with Groove Dark Green Part 3068b Element 6618078 or 4528778 ×4

Blue 12 pieces

  • Brick Curved 2 x 1 No Studs [1/2 Bow] Blue Part 11477 Element 6055065 ×4
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Blue Part 54200 Element 4504380 or 4296154 1 spare in the box ×4
  • Plate 4 x 8 Blue Part 3035 Element 303523 ×3
  • Plate Round Corner 4 x 4 Blue Part 30565 Element 6146306 or 4143267 ×1

Lime 11 pieces

  • Plate Round 1 x 1 with Solid Stud Lime Part 6141 Element 4183133 1 spare in the box ×11

Bright Green 10 pieces

  • Brick Sloped 30° 1 x 2 x 2/3 Bright Green Part 85984 Element 6138510 ×6
  • Plant, Flower, Plate Round 1 x 1 with 4 Petals Bright Green Part 33291 Element 6170300 or 4619599 1 spare in the box ×4

Yellow 10 pieces

  • Brick Curved 2 x 1 No Studs [1/2 Bow] Yellow Part 11477 Element 6029947 ×2
  • Flag 2 x 2 Square, Flat Clip Edge [Thick Clips] Yellow Part 11055 Element 6012442 ×2
  • Plate Round 1 x 1 with Solid Stud Yellow Part 6141 Element 614124 1 spare in the box ×4
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Yellow Part 42003 Element 6273711 or 4200324 ×2

Trans-Clear 9 pieces

  • Glass for Window 1 x 2 x 2 Flat Trans-Clear Part 60601 Element 6673770 or 6524697 ×2
  • Plate 1 x 2 Trans-Clear Part 3023 Element 6514001 or 6240204 ×3
  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 1 spare in the box ×4

Dark Red 8 pieces

  • Brick Round 1 x 1 Open Stud Dark Red Part 3062b Element 4539099 or 4183880 ×4
  • Tile 1 x 8 with Groove Dark Red Part 4162 Element 4539083 or 4509951 ×4

White 7 pieces

  • Panel 1 x 1 x 1 Corner White Part 6231 Element 6619293 or 623101 ×2
  • Panel 1 x 2 x 1 [Square Corners] White Part 4865a Element 486501 ×2
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×1
  • Window 1 x 2 x 2 Flat Front White Part 60592 Element 6550187 or 6382045 ×2

Dark Brown 5 pieces

  • Brick Sloped 75° 2 x 2 x 3 [Solid Studs] Dark Brown Part 98560 Element 6007899 ×4
  • Technic Pin Connector Hub with 1 Axle Dark Brown Part 22961 Element 6134197 ×1

Dark Tan 4 pieces

  • Bucket 1 x 1 x 1 Handle Dark Tan Part 95344 Element 6245275 or 4626884 1 spare in the box ×1
  • Plate 4 x 8 Dark Tan Part 3035 Element 6006524 or 4246954 ×1
  • Plate 6 x 8 Dark Tan Part 3036 Element 4251796 ×2

Trans-Yellow 2 pieces

  • Brick Round 1 x 1 Open Stud Trans-Yellow Part 3062b Element 6514236 or 6238674 ×2

Medium Nougat 1 piece

  • Tile Round 1 x 1 with Cookie Print Medium Nougat Part 98138pr0018 Element 6287854 or 6055384 1 spare in the box ×1

Orange 1 piece

  • Hat / Cap Short Curved Peak Orange Part 86035 Element 4583147 ×1

Trans-Light Blue 1 piece

  • Brick Round 1 x 1 Open Stud Trans-Light Blue Part 3062b Element 6514238 or 6238677 ×1

Minifigures 2 figures

  • Kid - Orange Torso, Dark Blue Legs, Dark Brown Hair Minifigure, checked as a whole figure ×1
  • Kid - White Torso, Dark Purple Legs, Dark Brown Hair 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

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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy