42666-1

Cat Birthday Party & Tree House

Set number: 42666-1
Year: 2025
Theme: Friends
Parts: 321
Minifigures: 2

Building instructions

The building instructions are on the official LEGO website. We do not host any instructions ourselves; the link below takes you to the official page.

View building instructions on LEGO.com (opens an external website)This set on Rebrickable (opens an external website)

Minifigures

fig-016290Leo - Red Shirt, Yellow Shorts1×4 parts
fig-015754Paisley - Bright Light Yellow Top, Medium Lavender Skirt1×4 parts

Parts list – 42666-1 Cat Birthday Party & Tree House

Search in the listColourCategorySort byShow spare parts

163 lines, 339 pieces

Parts list of set 42666-1
Part	Name	Colour	Quantity	Note
53451	Animal Body Part, Barb / Claw / Tooth / Talon / Horn, SmallAnimal / Creature Body Parts	Bright Green	4×
2652pr0007	Animal, Cat, Chubby with Bright Green Eyes, Light Bluish Grey Fur PrintAnimals / Creatures	Dark Bluish Gray	1×
2652pr0003	Animal, Cat, Chubby with Orange Face, Toes, Medium Blue/Lime Eyes PrintAnimals / Creatures	White	1×
69902pr0003	Animal, Cat, Kitten Sitting with Open Eyes, White Mouth, Nougat Paws PrintAnimals / Creatures	Nougat	1×
69902pr0004	Animal, Cat, Kitten Sitting with Yellow Eyes, Dark Pink Tongue PrintAnimals / Creatures	Black	1×
11602pr0010	Animal, Cat, Sitting with Dark Brown Stripes, White Chest, Ears PrintAnimals / Creatures	Medium Brown	1×
64648	Animal, Fish [Hollow Stud Mouth]Animals / Creatures	Bright Light Blue	1×
3957b	Antenna 1 x 4 with Flat TopBars, Ladders and Fences	Dark Orange	1×
3484	Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]Bars, Ladders and Fences	Reddish Brown	2×
78258	Bar 2L with Stop in CenterBars, Ladders and Fences	Reddish Brown	2×
78258	Bar 2L with Stop in CenterBars, Ladders and Fences	Tan	4×
78258	Bar 2L with Stop in CenterBars, Ladders and Fences	White	1×
30374	Bar 4L (Lightsaber Blade / Wand)Bars, Ladders and Fences	White	2×
87618	Bar 5L with Handle (Friction Ram)Bars, Ladders and Fences	Black	1×
11090	Bar Holder with ClipBars, Ladders and Fences	White	2×
23443	Bar Holder with Hole and Bar HandleBars, Ladders and Fences	Reddish Brown	1×
3005	Brick 1 x 1Bricks	Bright Light Orange	3×
3005	Brick 1 x 1Bricks	Coral	3×
3005	Brick 1 x 1Bricks	Medium Azure	5×
3004	Brick 1 x 2Bricks	Bright Light Orange	3×
3004	Brick 1 x 2Bricks	Coral	3×
3004	Brick 1 x 2Bricks	Dark Orange	3×
3622	Brick 1 x 3Bricks	White	2×
3010	Brick 1 x 4Bricks	Medium Azure	2×
3002	Brick 2 x 3Bricks	Dark Orange	1×
3659	Brick Arch 1 x 4Bricks Curved	Bright Light Orange	1×
6182	Brick Arch 1 x 4 x 2Bricks Curved	Coral	1×
14395	Brick Arch 1 x 5 x 4 [Continuous Bow, Raised Underside Cross Supports]Bricks Curved	Tan	2×
15254	Brick Arch 1 x 6 x 2 - Thin Top without Reinforced Underside [New Version]Bricks Curved	Medium Azure	1×
37352	Brick Curved 1 x 2 x 1 No StudsBricks Curved	Tan	2×
18653	Brick Curved 1 x 3 x 2 Inverted [Inside Bow]Bricks Curved	Medium Azure	2×
11477	Brick Curved 2 x 1 No Studs [1/2 Bow]Bricks Curved	Bright Green	2×
78666	Brick Curved 2 x 1 with Inverted CutoutBricks Curved	Bright Light Orange	2×
78666	Brick Curved 2 x 1 with Inverted CutoutBricks Curved	Coral	2×
32803	Brick Curved Inverted 2 x 2 x 2/3Bricks Curved	Bright Light Blue	2×
25214	Brick Round 1 x 1 Diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at Each EndBricks Round and Cones	Tan	6×
15395	Brick Round 2 x 2 Dome Bottom [Open Stud]Bricks Round and Cones	Bright Pink	2×
5690	Brick Round 2 x 2 Dome Top with 2 EarsBricks Round and Cones	Bright Pink	2×
87081	Brick Round 4 x 4 Centre HoleBricks Round and Cones	Yellow	1×
59900	Cone 1 x 1 [Top Groove]Bricks Round and Cones	Tan	6×
59900	Cone 1 x 1 [Top Groove]Bricks Round and Cones	Trans-Light Blue	1×
6259	Cylinder Half 2 x 4 x 4Bricks Round and Cones	Tan	3×
54200	Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Bricks Sloped	Bright Light Blue	2×
3298	Brick Sloped 33° 3 x 2Bricks Sloped	Reddish Brown	1×
4070	Brick Special 1 x 1 with HeadlightBricks Special	Bright Light Blue	2×
47905	Brick Special 1 x 1 with Studs on 2 SidesBricks Special	Blue	1×
86876	Brick Special 1 x 2 with 1 Center Stud on 1 Side, Bottom Stud HolderBricks Special	Bright Light Blue	1×
2877	Brick Special 1 x 2 with GrilleBricks Special	Tan	3×
22885	Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 SideBricks Special	Dark Turquoise	1×
2821	Container Box 2 x 2 x 1 Reinforced BottomContainers	Bright Light Orange	1×
2821	Container Box 2 x 2 x 1 Reinforced BottomContainers	Bright Pink	3×
92410	Cupboard 2 x 3 x 2 with Hollow StudsContainers	Blue	1×
37775	Wave / Flame Small with PinEnergy Effects	Trans-Orange	1×
80326	Flag 2 x 2 Square, Flared Clip Edge [Thick Clips]Flags, Banners and Signs	White	3×
27448	Turntable 2 x 2 FemaleHinges, Arms and Turntables	White	1×
37762	Equipment CandlestickMinifig Accessories	Black	1×
37762	Equipment CandlestickMinifig Accessories	Reddish Brown	6×
6900	Wool / YarnMinifig Accessories	Bright Light Yellow	1×
6900	Wool / YarnMinifig Accessories	Dark Pink	1×
11618	Headwear Accessory Bow with Heart, Long Ribbon and PinMinifig Headwear Accessories	Lavender	1×
33322	Headwear Accessory Crown / TiaraMinifig Headwear Accessories	Pearl Gold	1×
6913	Headwear Accessory Hat with Small Pin, CapMinifig Headwear Accessories	Lime	1×
24131	Headwear Accessory Hat with Small Pin, Clown / Party with PinMinifig Headwear Accessories	Pearl Gold	1×
3837	Equipment Shovel [Rounded Handle End]Minifig Shields, Weapons, & Tools	Flat Silver	1×
87544	Panel 1 x 2 x 3 [Side Supports / Hollow Studs]Panels	White	2×
18853	Plant, Flower with 5 Pointed Petals and PinPlants & Trees	Light Aqua	1×
5904	Plant, Flower, Peony Rose with 2 LayersPlants & Trees	Medium Lavender	2×
24866	Plant, Flower, Plate Round 1 x 1 with 5 PetalsPlants & Trees	Bright Green	4×
24866	Plant, Flower, Plate Round 1 x 1 with 5 PetalsPlants & Trees	Bright Light Yellow	2×
24866	Plant, Flower, Plate Round 1 x 1 with 5 PetalsPlants & Trees	Lavender	2×
2423	Plant, Leaves 4 x 3Plants & Trees	Lime	8×
5058	Plant, Leaves Stacked 4 x 5 x 1 2/3Plants & Trees	Bright Green	2×
5058	Plant, Leaves Stacked 4 x 5 x 1 2/3Plants & Trees	Lime	3×
32607	Plant, Plate 1 x 1 Round with 3 LeavesPlants & Trees	Bright Green	4×
32607	Plant, Plate 1 x 1 Round with 3 LeavesPlants & Trees	Yellowish Green	25×
37695	Plant, Stem with 3 Leaves and Bottom PinPlants & Trees	Bright Green	6×
86996	Plate 1 x 1 x 2/3 with Open StudPlates	Dark Orange	1×
4477	Plate 1 x 10Plates	Medium Azure	3×
3023	Plate 1 x 2Plates	Dark Orange	5×
3710	Plate 1 x 4Plates	Bright Green	2×
3022	Plate 2 x 2Plates	Light Bluish Gray	1×
3021	Plate 2 x 3Plates	Light Aqua	1×
3020	Plate 2 x 4Plates	Medium Lavender	1×
3020	Plate 2 x 4Plates	Orange	2×
3033	Plate 6 x 10Plates	Lime	2×
4740	Dish 2 x 2 Inverted [Radar]Plates Round Curved and Dishes	Blue	2×
4740	Dish 2 x 2 Inverted [Radar]Plates Round Curved and Dishes	Trans-Light Blue	1×
41948	Plate 8 x 8 with Rounded EndPlates Round Curved and Dishes	Magenta	1×
53119	Plate Round 1 x 1 Swirled Top / PooPlates Round Curved and Dishes	Reddish Brown	1×
6141	Plate Round 1 x 1 with Solid StudPlates Round Curved and Dishes	Bright Pink	4×
6141	Plate Round 1 x 1 with Solid StudPlates Round Curved and Dishes	Trans-Light Blue	1×
4032a	Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)Plates Round Curved and Dishes	Bright Pink	3×
4032a	Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)Plates Round Curved and Dishes	Medium Azure	2×
4032a	Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)Plates Round Curved and Dishes	Medium Nougat	1×
6003	Plate Round Corner 6 x 6Plates Round Curved and Dishes	Blue	2×
6003	Plate Round Corner 6 x 6Plates Round Curved and Dishes	Lime	1×
35480	Plate Special 1 x 2 Rounded with 2 Open StudsPlates Round Curved and Dishes	Bright Green	2×
35480	Plate Special 1 x 2 Rounded with 2 Open StudsPlates Round Curved and Dishes	Tan	1×
35044	Plate Special 4 x 4 with 3 x 3 Quarter Round CutoutPlates Round Curved and Dishes	Bright Pink	1×
35044	Plate Special 4 x 4 with 3 x 3 Quarter Round CutoutPlates Round Curved and Dishes	Yellow	1×
88072	Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm]Plates Special	Green	2×
88072	Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm]Plates Special	Tan	4×
11476	Plate Special 1 x 2 with Clip Horizontal on SidePlates Special	White	1×
78256	Plate Special 1 x 2 with Clip Vertical on EndPlates Special	Reddish Brown	1×
32028	Plate Special 1 x 2 with Door RailPlates Special	Tan	3×
87580	Plate Special 2 x 2 with Groove and Center Stud (Jumper)Plates Special	Bright Pink	1×
87580	Plate Special 2 x 2 with Groove and Center Stud (Jumper)Plates Special	Medium Azure	5×
87580	Plate Special 2 x 2 with Groove and Center Stud (Jumper)Plates Special	Yellow	1×
71752	Plate Special 2 x 2 x 2/3 with Axle Hole and Grill on Sides (Haybale)Plates Special	Tan	1×
65509	Plate Special 2 x 4 with Groove and Two Center Studs (Jumper)Plates Special	Bright Green	4×
32828	Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1LPlates Special	Black	1×
1745	Plate Special Round 1 x 2 Half Circle with Stud (Jumper)Plates Special	Blue	1×
18674	Plate Special Round 2 x 2 with Center Stud (Jumper Plate)Plates Special	Blue	2×
18674	Plate Special Round 2 x 2 with Center Stud (Jumper Plate)Plates Special	Bright Green	3×
18674	Plate Special Round 2 x 2 with Center Stud (Jumper Plate)Plates Special	Dark Pink	4×
51739	Wedge Plate 2 x 4Plates Wedged	Blue	1×
10113040	Sticker Sheet for Set 42666-1Stickers	[No Color/Any Color]	1×
14226c11	String with End Studs 11L OverallString, Bands and Reels	Black	1×
32062	Technic Axle 2 NotchedTechnic Axles	Red	6×
3700	Technic Brick 1 x 2 [1 Pin Hole]Technic Bricks	Reddish Brown	1×
24122	Large Figure Weapon Lightsaber Hilt with Axle Hole and Two Bar HoldersTechnic Connectors	Reddish Brown	2×
57585	Technic Axle Connector Hub with 3 Axles at 120°Technic Connectors	Light Bluish Gray	3×
59443	Technic Axle Connector Smooth [with x Hole + Orientation]Technic Connectors	Tan	6×
4274	Technic Pin 1/2 without Friction RidgesTechnic Pins	Light Bluish Gray	1×
3069bpr9932	Tile 1 x 2 with Cat Food Box, Cat, White 'MEOW BITS' PrintTiles	Light Aqua	2×
3069b	Tile 1 x 2 with GrooveTiles	Dark Turquoise	2×
3069b	Tile 1 x 2 with GrooveTiles	Medium Azure	4×
2431	Tile 1 x 4 with GrooveTiles	Bright Green	2×
3068b	Tile 2 x 2 with GrooveTiles	Bright Light Orange	1×
3068b	Tile 2 x 2 with GrooveTiles	Bright Pink	2×
26603	Tile 2 x 3Tiles	Blue	2×
27925	Tile 2 x 2 Curved, MacaroniTiles Round and Curved	Coral	2×
98138	Tile Round 1 x 1Tiles Round and Curved	Trans-Yellow	1×
98138pr0056	Tile Round 1 x 1 with Animal Track PrintTiles Round and Curved	Medium Nougat	6×
98138pr0008	Tile Round 1 x 1 with Offset Black Eye PrintTiles Round and Curved	White	2×
1748	Tile Round 1 x 2 Half CircleTiles Round and Curved	Medium Azure	2×
75c09	Hose Rigid 3mm D. 9L / 7.2cmTubes and Hoses	Black	1×
60594	Window 1 x 4 x 3 without Shutter TabsWindows and Doors	White	1×
53451	Animal Body Part, Barb / Claw / Tooth / Talon / Horn, SmallAnimal / Creature Body Parts	Bright Green	1×	Spare
3957b	Antenna 1 x 4 with Flat TopBars, Ladders and Fences	Dark Orange	1×	Spare
78258	Bar 2L with Stop in CenterBars, Ladders and Fences	Reddish Brown	1×	Spare
78258	Bar 2L with Stop in CenterBars, Ladders and Fences	Tan	1×	Spare
78258	Bar 2L with Stop in CenterBars, Ladders and Fences	White	1×	Spare
54200	Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Bricks Sloped	Bright Light Blue	1×	Spare
37775	Wave / Flame Small with PinEnergy Effects	Trans-Orange	1×	Spare
11618	Headwear Accessory Bow with Heart, Long Ribbon and PinMinifig Headwear Accessories	Lavender	1×	Spare
33322	Headwear Accessory Crown / TiaraMinifig Headwear Accessories	Pearl Gold	1×	Spare
6913	Headwear Accessory Hat with Small Pin, CapMinifig Headwear Accessories	Lime	1×	Spare
18853	Plant, Flower with 5 Pointed Petals and PinPlants & Trees	Light Aqua	2×	Spare
24866	Plant, Flower, Plate Round 1 x 1 with 5 PetalsPlants & Trees	Bright Green	1×	Spare
24866	Plant, Flower, Plate Round 1 x 1 with 5 PetalsPlants & Trees	Bright Light Yellow	1×	Spare
24866	Plant, Flower, Plate Round 1 x 1 with 5 PetalsPlants & Trees	Lavender	1×	Spare
37695	Plant, Stem with 3 Leaves and Bottom PinPlants & Trees	Bright Green	1×	Spare
53119	Plate Round 1 x 1 Swirled Top / PooPlates Round Curved and Dishes	Reddish Brown	1×	Spare
6141	Plate Round 1 x 1 with Solid StudPlates Round Curved and Dishes	Bright Pink	1×	Spare
6141	Plate Round 1 x 1 with Solid StudPlates Round Curved and Dishes	Trans-Light Blue	1×	Spare
32828	Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1LPlates Special	Black	1×	Spare
14226c11	String with End Studs 11L OverallString, Bands and Reels	Black	1×	Spare
4274	Technic Pin 1/2 without Friction RidgesTechnic Pins	Light Bluish Gray	1×	Spare
98138	Tile Round 1 x 1Tiles Round and Curved	Trans-Yellow	1×	Spare
98138pr0056	Tile Round 1 x 1 with Animal Track PrintTiles Round and Curved	Medium Nougat	1×	Spare
98138pr0008	Tile Round 1 x 1 with Offset Black Eye PrintTiles Round and Curved	White	1×	Spare
1748	Tile Round 1 x 2 Half CircleTiles Round and Curved	Medium Azure	1×	Spare