Rare parts in 42666-1: Cat Birthday Party

This set inventory has been obtained from LEGO Customer Services replacement parts page. It was retrieved on 3 October 2025 and contains 320 pieces.

Important note: We do not control this inventory and cannot currently make changes to it. Use it as a guide to the contents of the set, or to find out part numbers when requesting replacements.

Element Image Qty Colour Category Design Element name Element
in sets		 Element
introduced in		 Design
in sets		 Design
introduced in
6527761 <h1><a href='/parts/6527761/flat-tile-1x2-no-483'>FLAT TILE 1X2, NO. 483</a></h1><div class='tags floatleft'><a href='/parts/6527761/flat-tile-1x2-no-483'>6527761</a> <a href='/parts/design-111402'>111402</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Plates'>Plates</a> <a href='/parts/colour-Aqua'>Aqua</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

FLAT TILE 1X2, NO. 483

6527761 111402 System Plates Aqua 2025
©2025 LEGO Group
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2 Aqua Plates 111402 FLAT TILE 1X2, NO. 483 3 2025 3 2025
6541476 <h1><a href='/parts/6541476/design-shape-w-tube-crosshole'>DESIGN SHAPE W/ TUBE, CROSSHOLE</a></h1><div class='tags floatleft'><a href='/parts/6541476/design-shape-w-tube-crosshole'>6541476</a> <a href='/parts/design-25214'>25214</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Miscellaneous'>Miscellaneous</a> <a href='/parts/colour-Brick-Yellow'>Brick Yellow</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

DESIGN SHAPE W/ TUBE, CROSSHOLE

6541476 25214 System Miscellaneous Brick Yellow 2025
©2025 LEGO Group
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6 Brick Yellow Miscellaneous 25214 DESIGN SHAPE W/ TUBE, CROSSHOLE 3 2025 315 2016
6527826 <h1><a href='/parts/6527826/horn-w-shaft-ø-3-2'>HORN W. SHAFT Ø 3.2</a></h1><div class='tags floatleft'><a href='/parts/6527826/horn-w-shaft-ø-3-2'>6527826</a> <a href='/parts/design-88513'>88513</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Animals-Nature'>Animals & Nature</a> <a href='/parts/colour-Bright-Green'>Bright Green</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

HORN W. SHAFT Ø 3.2

6527826 88513 System Animals & Nature Bright Green 2025
©2025 LEGO Group
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4 Bright Green Animals & Nature 88513 HORN W. SHAFT Ø 3.2 3 2025 925 2006
6490950 <h1><a href='/parts/6490950/brick-4x4-round-w-ø4-9-w-kl'>BRICK 4X4 ROUND W. Ø4.9 W. KL.</a></h1><div class='tags floatleft'><a href='/parts/6490950/brick-4x4-round-w-ø4-9-w-kl'>6490950</a> <a href='/parts/design-87081'>87081</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Bricks'>Bricks</a> <a href='/parts/colour-Bright-Yellow'>Bright Yellow</a> <a href='/parts/year-2024'>2024</a></div><div class='floatright'>©2024 LEGO Group</div>

BRICK 4X4 ROUND W. Ø4.9 W. KL.

6490950 87081 System Bricks Bright Yellow 2024
©2024 LEGO Group
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1 Bright Yellow Bricks 87081 BRICK 4X4 ROUND W. Ø4.9 W. KL. 3 2024 418 2010
6522798 <h1><a href='/parts/6522798/leaf-4x5x1-2-3'>LEAF 4X5X1 2/3</a></h1><div class='tags floatleft'><a href='/parts/6522798/leaf-4x5x1-2-3'>6522798</a> <a href='/parts/design-5058'>5058</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Animals-Nature'>Animals & Nature</a> <a href='/parts/colour-Bright-Yellowish-Green'>Bright Yellowish Green</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

LEAF 4X5X1 2/3

6522798 5058 System Animals & Nature Bright Yellowish Green 2025
©2025 LEGO Group
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3 Bright Yellowish Green Animals & Nature 5058 LEAF 4X5X1 2/3 2 2025 43 2024
6536259 <h1><a href='/parts/6536259/brick-2x3'>BRICK 2X3</a></h1><div class='tags floatleft'><a href='/parts/6536259/brick-2x3'>6536259</a> <a href='/parts/design-3002'>3002</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Bricks'>Bricks</a> <a href='/parts/colour-Dark-Orange'>Dark Orange</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

BRICK 2X3

6536259 3002 System Bricks Dark Orange 2025
©2025 LEGO Group
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1 Dark Orange Bricks 3002 BRICK 2X3 3 2025 3646 1992
6542233 <h1><a href='/parts/6542233/cat-no-55'>CAT, NO. 55</a></h1><div class='tags floatleft'><a href='/parts/6542233/cat-no-55'>6542233</a> <a href='/parts/design-113035'>113035</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Animals-Nature'>Animals & Nature</a> <a href='/parts/colour-Dark-Stone-Grey'>Dark Stone Grey</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

CAT, NO. 55

6542233 113035 System Animals & Nature Dark Stone Grey 2025
©2025 LEGO Group
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1 Dark Stone Grey Animals & Nature 113035 CAT, NO. 55 1 2025 1 2025
6526012 <h1><a href='/parts/6526012/plate-4x4-w-arch'>PLATE 4X4, W/ ARCH</a></h1><div class='tags floatleft'><a href='/parts/6526012/plate-4x4-w-arch'>6526012</a> <a href='/parts/design-35044'>35044</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Plates'>Plates</a> <a href='/parts/colour-Light-Purple'>Light Purple</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

PLATE 4X4, W/ ARCH

6526012 35044 System Plates Light Purple 2025
©2025 LEGO Group
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1 Light Purple Plates 35044 PLATE 4X4, W/ ARCH 3 2025 221 2018
6541655 <h1><a href='/parts/6541655/dome-2x2-inverted-w-one-stud'>DOME 2X2, INVERTED W. ONE STUD</a></h1><div class='tags floatleft'><a href='/parts/6541655/dome-2x2-inverted-w-one-stud'>6541655</a> <a href='/parts/design-15395'>15395</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Bricks'>Bricks</a> <a href='/parts/colour-Light-Purple'>Light Purple</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

DOME 2X2, INVERTED W. ONE STUD

6541655 15395 System Bricks Light Purple 2025
©2025 LEGO Group
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2 Light Purple Bricks 15395 DOME 2X2, INVERTED W. ONE STUD 2 2025 514 2014
6520143 <h1><a href='/parts/6520143/cat-w-1-5-hole-no-34'>CAT, W/ 1.5 HOLE, NO. 34</a></h1><div class='tags floatleft'><a href='/parts/6520143/cat-w-1-5-hole-no-34'>6520143</a> <a href='/parts/design-110335'>110335</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Animals-Nature'>Animals & Nature</a> <a href='/parts/colour-Medium-Brown'>Medium Brown</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

CAT, W/ 1.5 HOLE, NO. 34

6520143 110335 System Animals & Nature Medium Brown 2025
©2025 LEGO Group
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1 Medium Brown Animals & Nature 110335 CAT, W/ 1.5 HOLE, NO. 34 3 2025 3 2025
6484627 <h1><a href='/parts/6484627/shorts-w-hip-no-15'>SHORTS, W/ HIP, NO. 15</a></h1><div class='tags floatleft'><a href='/parts/6484627/shorts-w-hip-no-15'>6484627</a> <a href='/parts/design-36198'>36198</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Minifigure-Parts'>Minifigure Parts</a> <a href='/parts/colour-Medium-Lavender'>Medium Lavender</a> <a href='/parts/year-2024'>2024</a></div><div class='floatright'>©2024 LEGO Group</div>

SHORTS, W/ HIP, NO. 15

6484627 36198 System Minifigure Parts Medium Lavender 2024
©2024 LEGO Group
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1 Medium Lavender Minifigure Parts 36198 SHORTS, W/ HIP, NO. 15 3 2024 81 2020
6542234 <h1><a href='/parts/6542234/cat-w-1-5-hole-no-37'>CAT, W/ 1.5 HOLE, NO. 37</a></h1><div class='tags floatleft'><a href='/parts/6542234/cat-w-1-5-hole-no-37'>6542234</a> <a href='/parts/design-113036'>113036</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Animals-Nature'>Animals & Nature</a> <a href='/parts/colour-Nougat'>Nougat</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

CAT, W/ 1.5 HOLE, NO. 37

6542234 113036 System Animals & Nature Nougat 2025
©2025 LEGO Group
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1 Nougat Animals & Nature 113036 CAT, W/ 1.5 HOLE, NO. 37 2 2025 2 2025
6541654 <h1><a href='/parts/6541654/brick-1x2-outside-half-arch-no-1'>BRICK 1X2, OUTSIDE HALF ARCH, NO. 1</a></h1><div class='tags floatleft'><a href='/parts/6541654/brick-1x2-outside-half-arch-no-1'>6541654</a> <a href='/parts/design-78666'>78666</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Bricks'>Bricks</a> <a href='/parts/colour-Vibrant-Coral'>Vibrant Coral</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

BRICK 1X2, OUTSIDE HALF ARCH, NO. 1

6541654 78666 System Bricks Vibrant Coral 2025
©2025 LEGO Group
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2 Vibrant Coral Bricks 78666 BRICK 1X2, OUTSIDE HALF ARCH, NO. 1 1 2025 310 2021
6520273 <h1><a href='/parts/6520273/cat-no-51'>CAT, NO. 51</a></h1><div class='tags floatleft'><a href='/parts/6520273/cat-no-51'>6520273</a> <a href='/parts/design-110359'>110359</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Animals-Nature'>Animals & Nature</a> <a href='/parts/colour-White'>White</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

CAT, NO. 51

6520273 110359 System Animals & Nature White 2025
©2025 LEGO Group
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1 White Animals & Nature 110359 CAT, NO. 51 1 2025 1 2025