Cat Birthday Party & Tree House (42666-1)
Price Comparison
Find the cheapest deal for Cat Birthday Party & Tree House across 7 retailers in The United States.
| Shop | Price |
|---|---|
![]() | - $6.00 (20%) |
![]() | - $3.11 (10%) |
![]() | - $3.11 (10%) |
![]() | - $0.04 (0%) |
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Set details
Name: Cat Birthday Party & Tree HouseSet number: 42666-1
Year: 2025
Theme: Friends
Number of parts: 321
Number of part types: 138
Age rating: 6+
Retail price: $29.99
Retirement date: 31-12-2026
Discover a paw-some building kit for girls, boys and cat-lovers aged 6 and up. The LEGO® Friends Cat Birthday Party & Tree House (42666) toy comes with 2 minidolls, 5 cat figures and lots of accessories for imaginative play packed with sweet kitty moments. This fun toy sets the scene for Churro’s birthday party. 4 of Churro’s feline friends are here too, plus LEGO Friends characters Leo and Paisley. Explore the fun details, including birthday presents, banners and cat-shaped balloons. Kids will love guiding the pets around the cat tree house, where there’s a fish-shaped piñata, a cat toy, cat grass, a water fountain and litter box. Then it’s time for the cats to sit at the rotating table to enjoy Churro’s birthday cake. With so many ways to play with this animal playset, kids can tell a different friendship story every time. Discover more exciting creative toys (sold separately) in the LEGO Friends universe. This LEGO set comes with the LEGO Builder app for intuitive building.
Price History
Track how the lowest available price for set 42666-1 in The United States has changed over time.
Browse all 321 parts in set 42666-1 with individual pricing from BrickLink or Brick Owl.
Pricing information known of 136/138 parts.
| Part | Color | Quantity | Average price | Total | Value | |
|---|---|---|---|---|---|---|
![]() | Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end ![]() | 6 x $0.67 $4.05 | ||||
![]() | String with End Studs 11L Overall ![]() | 2 x $1.36 $2.72 | ||||
![]() | Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small ![]() | 5 x $0.41 $2.05 | ||||
![]() | Animal, Cat, Chubby with orange Face, Toes, Medium Blue/Lime Eyes print ![]() | 1 x $2.02 $2.02 | ||||
![]() | Plant, Plate 1 x 1 Round with 3 Leaves ![]() | 25 x $0.08 $1.98 | ||||
![]() | Animal, Cat, Chubby with Bright Green Eyes, Light Bluish Grey Fur print ![]() | 1 x $1.97 $1.97 | ||||
![]() | Animal, Cat, Sitting with Dark Brown Stripes, White Chest, Ears print ![]() | 1 x $1.79 $1.79 | ||||
![]() | Animal, Cat, Kitten Sitting with Open Eyes, White Mouth, Nougat Paws print ![]() | 1 x $1.72 $1.72 | ||||
![]() | Plant, Leaves Stacked 4 x 5 x 1 2/3 ![]() | 3 x $0.49 $1.47 | ||||
![]() | Animal, Cat, Kitten Sitting with Yellow Eyes, Dark Pink Tongue print ![]() | 1 x $1.35 $1.35 | ||||
![]() | Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) ![]() | 3 x $0.42 $1.27 | ||||
![]() | Plate Round Corner 6 x 6 ![]() | 2 x $0.60 $1.19 | ||||
![]() | Wool / Yarn ![]() | 1 x $1.16 $1.16 | ||||
![]() | Plate 1 x 10 ![]() | 3 x $0.34 $1.03 | ||||
![]() | Container Box 2 x 2 x 1 Reinforced Bottom ![]() | 3 x $0.32 $0.95 | ||||
![]() | Brick 2 x 3 ![]() | 1 x $0.93 $0.93 | ||||
![]() | Plate 6 x 10 ![]() | 2 x $0.44 $0.87 | ||||
![]() | Headwear Accessory Hat with Small Pin, Cap ![]() | 2 x $0.42 $0.85 | ||||
![]() | Plant, Stem with 3 Leaves and Bottom Pin ![]() | 7 x $0.12 $0.83 | ||||
![]() | Equipment Candlestick ![]() | 6 x $0.13 $0.79 | ||||
![]() | Plant, Flower with 5 Pointed Petals and Pin ![]() | 3 x $0.26 $0.79 | ||||
![]() | Plant, Leaves 4 x 3 ![]() | 8 x $0.09 $0.74 | ||||
![]() | Plate Special 1 x 2 Rounded with 2 Open Studs ![]() | 2 x $0.37 $0.74 | ||||
![]() | Cylinder Half 2 x 4 x 4 ![]() | 3 x $0.24 $0.71 | ||||
![]() | Technic Axle Connector Smooth [with x Hole + Orientation] ![]() | 6 x $0.12 $0.71 | ||||
![]() | Plant, Leaves Stacked 4 x 5 x 1 2/3 ![]() | 2 x $0.33 $0.66 | ||||
![]() | Flag 2 x 2 Square, Flared Clip Edge [Thick Clips] ![]() | 3 x $0.21 $0.63 | ||||
![]() | Technic Axle Connector Hub with 3 Axles at 120° ![]() | 3 x $0.21 $0.63 | ||||
![]() | Brick Special 1 x 1 with Studs on 2 Sides ![]() | 1 x $0.62 $0.62 | ||||
![]() | Brick Round 2 x 2 Dome Top with 2 Ears ![]() | 2 x $0.30 $0.61 | ||||
![]() | Brick Curved 2 x 1 No Studs [1/2 Bow] ![]() | 2 x $0.30 $0.61 | ||||
![]() | Plate Special Round 1 x 2 Half Circle with Stud (Jumper) ![]() | 1 x $0.61 $0.61 | ||||
![]() | Tile Round 1 x 2 Half Circle ![]() | 3 x $0.20 $0.60 | ||||
![]() | Brick Round 4 x 4 Centre Hole ![]() | 1 x $0.58 $0.58 | ||||
![]() | Tile 1 x 2 with Cat Food Box, Cat, White 'MEOW BITS' print ![]() | 2 x $0.28 $0.56 | ||||
![]() | Brick Round 2 x 2 Dome Bottom [Open Stud] ![]() | 2 x $0.28 $0.56 | ||||
![]() | Wool / Yarn ![]() | 1 x $0.56 $0.56 | ||||
![]() | Bar 2L with Stop in Center ![]() | 5 x $0.11 $0.53 | ||||
![]() | Large Figure Weapon Lightsaber Hilt with Axle Hole and Two Bar Holders ![]() | 2 x $0.24 $0.48 | ||||
![]() | Hose Rigid 3mm D. 9L / 7.2cm ![]() | 1 x $0.46 $0.46 | ||||
![]() | Tile 2 x 3 ![]() | 2 x $0.22 $0.45 | ||||
![]() | Bar 2L with Stop in Center ![]() | 3 x $0.15 $0.44 | ||||
![]() | Plant, Flower, Peony Rose with 2 Layers ![]() | 2 x $0.21 $0.42 | ||||
![]() | Plate 1 x 4 ![]() | 2 x $0.20 $0.40 | ||||
![]() | Brick Curved Inverted 2 x 2 x 2/3 ![]() | 2 x $0.19 $0.37 | ||||
![]() | Plate Special 4 x 4 with 3 x 3 Quarter Round Cutout ![]() | 1 x $0.36 $0.36 | ||||
![]() | Plate 1 x 2 ![]() | 5 x $0.07 $0.33 | ||||
![]() | Brick Special 1 x 2 with 1 Center Stud on 1 Side, Bottom Stud Holder ![]() | 1 x $0.30 $0.30 | ||||
![]() | Brick Arch 1 x 5 x 4 [Continuous Bow, Raised Underside Cross Supports] ![]() | 2 x $0.15 $0.29 | ||||
![]() | Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) ![]() | 3 x $0.09 $0.28 | ||||
![]() | Brick 1 x 2 ![]() | 3 x $0.09 $0.28 | ||||
![]() | Plate Special 1 x 2 with Door Rail ![]() | 3 x $0.09 $0.28 | ||||
![]() | Panel 1 x 2 x 3 [Side Supports / Hollow Studs] ![]() | 2 x $0.13 $0.26 | ||||
![]() | Brick Curved 2 x 1 with Inverted Cutout ![]() | 2 x $0.13 $0.26 | ||||
![]() | Brick Special 1 x 1 with Headlight ![]() | 2 x $0.13 $0.26 | ||||
![]() | Plate Special Round 2 x 2 with Center Stud (Jumper Plate) ![]() | 3 x $0.08 $0.24 | ||||
![]() | Cone 1 x 1 [Top Groove] ![]() | 6 x $0.04 $0.24 | ||||
![]() | Brick Special 1 x 2 with Grille ![]() | 3 x $0.08 $0.24 | ||||
![]() | Tile 1 x 4 with Groove ![]() | 2 x $0.12 $0.24 | ||||
![]() | Plate Special Round 2 x 2 with Center Stud (Jumper Plate) ![]() | 2 x $0.12 $0.24 | ||||
![]() | Animal, Fish [Hollow Stud Mouth] ![]() | 1 x $0.22 $0.22 | ||||
![]() | Antenna 1 x 4 with Flat Top ![]() | 2 x $0.11 $0.21 | ||||
![]() | Tile 1 x 2 with Groove ![]() | 4 x $0.05 $0.21 | ||||
![]() | Brick Curved 1 x 2 x 1 No Studs ![]() | 2 x $0.11 $0.21 | ||||
![]() | Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 Side ![]() | 1 x $0.21 $0.21 | ||||
![]() | Plate Special 2 x 4 with Groove and Two Center Studs (Jumper) ![]() | 4 x $0.05 $0.21 | ||||
![]() | Brick 1 x 1 ![]() | 5 x $0.04 $0.20 | ||||
![]() | Tile Round 1 x 1 with Animal Track Print ![]() | 7 x $0.03 $0.19 | ||||
![]() | Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip] ![]() | 2 x $0.09 $0.19 | ||||
![]() | Bar Holder with Clip ![]() | 2 x $0.09 $0.19 | ||||
![]() | Brick 1 x 3 ![]() | 2 x $0.09 $0.19 | ||||
![]() | Brick Curved 1 x 3 x 2 Inverted [Inside Bow] ![]() | 2 x $0.09 $0.19 | ||||
![]() | Bar 2L with Stop in Center ![]() | 2 x $0.09 $0.19 | ||||
![]() | Tile 2 x 2 with Groove ![]() | 2 x $0.09 $0.19 | ||||
![]() | Bar 4L (Lightsaber Blade / Wand) ![]() | 2 x $0.09 $0.19 | ||||
![]() | Headwear Accessory Crown / Tiara ![]() | 2 x $0.09 $0.19 | ||||
![]() | Brick Curved 2 x 1 with Inverted Cutout ![]() | 2 x $0.09 $0.19 | ||||
![]() | Window 1 x 4 x 3 without Shutter Tabs ![]() | 1 x $0.19 $0.19 | ||||
![]() | Plate Special 1 x 2 with Clip Vertical on End ![]() | 1 x $0.17 $0.17 | ||||
![]() | Technic Axle 2 Notched ![]() | 6 x $0.03 $0.16 | ||||
![]() | Plate Special Round 2 x 2 with Center Stud (Jumper Plate) ![]() | 4 x $0.04 $0.16 | ||||
![]() | Plant, Plate 1 x 1 Round with 3 Leaves ![]() | 4 x $0.04 $0.16 | ||||
![]() | Brick 1 x 2 ![]() | 3 x $0.05 $0.16 | ||||
![]() | Brick 1 x 1 ![]() | 3 x $0.05 $0.16 | ||||
![]() | Brick 1 x 2 ![]() | 3 x $0.05 $0.16 | ||||
![]() | Brick 1 x 1 ![]() | 3 x $0.05 $0.16 | ||||
![]() | Plant, Flower, Plate Round 1 x 1 with 5 Petals ![]() | 5 x $0.03 $0.13 | ||||
![]() | Plate Special 2 x 2 with Groove and Center Stud (Jumper) ![]() | 5 x $0.03 $0.13 | ||||
![]() | Plate 8 x 8 with Rounded End ![]() | 1 x $0.13 $0.13 | ||||
![]() | Cupboard 2 x 3 x 2 with Hollow Studs ![]() | 1 x $0.13 $0.13 | ||||
![]() | Dish 2 x 2 Inverted [Radar] ![]() | 2 x $0.07 $0.13 | ||||
![]() | Brick 1 x 4 ![]() | 2 x $0.07 $0.13 | ||||
![]() | Tile 1 x 2 with Groove ![]() | 2 x $0.07 $0.13 | ||||
![]() | Plate Special 2 x 2 x 2/3 with Axle Hole and Grill on Sides (Haybale) ![]() | 1 x $0.12 $0.12 | ||||
![]() | Brick Sloped 33° 3 x 2 ![]() | 1 x $0.12 $0.12 | ||||
![]() | Plate 2 x 3 ![]() | 1 x $0.12 $0.12 | ||||
![]() | Equipment Candlestick ![]() | 1 x $0.12 $0.12 | ||||
![]() | Container Box 2 x 2 x 1 Reinforced Bottom ![]() | 1 x $0.12 $0.12 | ||||
![]() | Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm] ![]() | 4 x $0.03 $0.11 | ||||
![]() | Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L ![]() | 2 x $0.05 $0.11 | ||||
![]() | Plate 2 x 4 ![]() | 2 x $0.05 $0.11 | ||||
![]() | Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm] ![]() | 2 x $0.05 $0.11 | ||||
![]() | Brick Arch 1 x 4 x 2 ![]() | 1 x $0.11 $0.11 | ||||
![]() | Plate Round 1 x 1 Swirled Top / Poo ![]() | 2 x $0.05 $0.11 | ||||
![]() | Bar 5L with Handle (Friction Ram) ![]() | 1 x $0.11 $0.11 | ||||
![]() | Bar Holder with Hole and Bar Handle ![]() | 1 x $0.11 $0.11 | ||||
![]() | Tile 2 x 2 Curved, Macaroni ![]() | 2 x $0.05 $0.11 | ||||
![]() | Tile 2 x 2 with Groove ![]() | 1 x $0.09 $0.09 | ||||
![]() | Plate Special 1 x 2 Rounded with 2 Open Studs ![]() | 1 x $0.09 $0.09 | ||||
![]() | Equipment Shovel [Rounded Handle End] ![]() | 1 x $0.09 $0.09 | ||||
![]() | Plate 1 x 1 x 2/3 with Open Stud ![]() | 1 x $0.09 $0.09 | ||||
![]() | Plant, Flower, Plate Round 1 x 1 with 5 Petals ![]() | 3 x $0.03 $0.08 | ||||
![]() | Plant, Flower, Plate Round 1 x 1 with 5 Petals ![]() | 3 x $0.03 $0.08 | ||||
![]() | Tile Round 1 x 1 with Offset Black Eye Print ![]() | 3 x $0.03 $0.08 | ||||
![]() | Wave / Flame Small with Pin ![]() | 2 x $0.04 $0.08 | ||||
![]() | Technic Pin 1/2 without Friction Ridges ![]() | 2 x $0.04 $0.08 | ||||
![]() | Plate Special 2 x 2 with Groove and Center Stud (Jumper) ![]() | 1 x $0.08 $0.08 | ||||
![]() | Headwear Accessory Hat with Small Pin, Clown / Party with Pin ![]() | 1 x $0.08 $0.08 | ||||
![]() | Wedge Plate 2 x 4 ![]() | 1 x $0.08 $0.08 | ||||
![]() | Plate Round 1 x 1 with Solid Stud ![]() | 2 x $0.04 $0.08 | ||||
![]() | Plate Special 4 x 4 with 3 x 3 Quarter Round Cutout ![]() | 1 x $0.07 $0.07 | ||||
![]() | Plate Round 1 x 1 with Solid Stud ![]() | 5 x $0.01 $0.07 | ||||
![]() | Tile Round 1 x 1 ![]() | 2 x $0.03 $0.05 | ||||
![]() | Headwear Accessory Bow with Heart, Long Ribbon and Pin ![]() | 2 x $0.03 $0.05 | ||||
![]() | Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) ![]() | 2 x $0.03 $0.05 | ||||
![]() | Dish 2 x 2 Inverted [Radar] ![]() | 1 x $0.05 $0.05 | ||||
![]() | Cone 1 x 1 [Top Groove] ![]() | 1 x $0.05 $0.05 | ||||
![]() | Plate 2 x 2 ![]() | 1 x $0.05 $0.05 | ||||
![]() | Plate Special 1 x 2 with Clip Horizontal on Side ![]() | 1 x $0.05 $0.05 | ||||
![]() | Turntable 2 x 2 Female ![]() | 1 x $0.05 $0.05 | ||||
![]() | Brick Arch 1 x 4 ![]() | 1 x $0.05 $0.05 | ||||
![]() | Technic Brick 1 x 2 [1 Pin Hole] ![]() | 1 x $0.04 $0.04 | ||||
![]() | Plate Special 2 x 2 with Groove and Center Stud (Jumper) ![]() | 1 x $0.04 $0.04 | ||||
![]() | Plate 2 x 4 ![]() | 1 x $0.04 $0.04 | ||||
![]() | Plate Round Corner 6 x 6 ![]() | 1 x $0.04 $0.04 | ||||
![]() | Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) ![]() | 1 x $0.03 $0.03 | ||||
Missing pricing information on the following items.
| Part | Color | Quantity | |
|---|---|---|---|
![]() | Sticker Sheet for Set 42666-1 ![]() | ||
![]() | Brick Arch 1 x 6 x 2 - Thin Top without Reinforced Underside [New Version] ![]() | ||
Minifigures included in set 42666-1.
| Minifigure | Quantity | Value | |
|---|---|---|---|
![]() | Leo - Red Shirt, Yellow Shorts fig-016290, frnd0846, BOID 948583 | 1 | $2.10 |
![]() | Paisley - Bright Light Yellow Top, Medium Lavender Skirt fig-015754, frnd0819, BOID 1447235 | 1 | $2.75 |
| Total minifigure value: | $4.85 | ||
Compare the value of buying Cat Birthday Party & Tree House as a complete set versus the total value of all parts individually.
| Value Breakdown | |
| Parts value | $58.71 |
| Minifigure value | $4.85 |
| Total inventory value | $63.56 |
BrickLink 
Ratio: what the parts sell for, over what the set sells for. Above 1× the parts are worth more than the set.
Brick Owl 
Find the cheapest offers for set 42666-1 from sellers on secondary marketplaces like Brick Owl and eBay. As an eBay Partner Network Affiliate and Brick Owl Affiliate, I earn from qualifying purchases.
Brick Owl and eBay marketplace offers.
BrickLink history of 0 sales with 0 total item quantity. Item condition: New.
No sale history available.































![Tan Technic Axle Connector Smooth [with x Hole + Orientation]](https://api.brickonomics.net/assets/parts/59443/19/lego_element_6262188_photoreal_00001.webp)

![White Flag 2 x 2 Square, Flared Clip Edge [Thick Clips]](https://api.brickonomics.net/assets/parts/80326/15/lego_element_6365487_photoreal_00001.webp)



![Bright Green Brick Curved 2 x 1 No Studs [1/2 Bow]](https://api.brickonomics.net/assets/parts/11477/10/lego_element_6460836_photoreal_00001.webp)




![Bright Pink Brick Round 2 x 2 Dome Bottom [Open Stud]](https://api.brickonomics.net/assets/parts/15395/29/lego_element_6541655_photoreal_00001.webp)












![Tan Brick Arch 1 x 5 x 4 [Continuous Bow, Raised Underside Cross Supports]](https://api.brickonomics.net/assets/parts/14395/19/lego_element_6075057_photoreal_00001.webp)



![White Panel 1 x 2 x 3 [Side Supports / Hollow Studs]](https://api.brickonomics.net/assets/parts/87544/15/lego_element_4585448_photoreal_00001.webp)



![Tan Cone 1 x 1 [Top Groove]](https://api.brickonomics.net/assets/parts/59900/19/lego_element_4529237_photoreal_00001.webp)



![Bright Light Blue Animal, Fish [Hollow Stud Mouth]](https://api.brickonomics.net/assets/parts/64648/212/lego_element_6195347_photoreal_00001.webp)







![Reddish Brown Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]](https://api.brickonomics.net/assets/parts/3484/70/lego_element_6439053_photoreal_00001.webp)


![Medium Azure Brick Curved 1 x 3 x 2 Inverted [Inside Bow]](https://api.brickonomics.net/assets/parts/18653/322/lego_element_6357619_photoreal_00001.webp)


















![Blue Dish 2 x 2 Inverted [Radar]](https://api.brickonomics.net/assets/parts/4740/1/lego_element_4570283_photoreal_00001.webp)







![Tan Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm]](https://api.brickonomics.net/assets/parts/88072/19/lego_element_6261357_photoreal_00001.webp)


![Green Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm]](https://api.brickonomics.net/assets/parts/88072/2/lego_element_6073022_photoreal_00001.webp)







![Flat Silver Equipment Shovel [Rounded Handle End]](https://api.brickonomics.net/assets/parts/3837/179/lego_element_6210601_photoreal_00001.webp)















![Trans-Light Blue Dish 2 x 2 Inverted [Radar]](https://api.brickonomics.net/assets/parts/4740/41/lego_element_6245307_photoreal_00001.webp)
![Trans-Light Blue Cone 1 x 1 [Top Groove]](https://api.brickonomics.net/assets/parts/59900/41/lego_element_6514027_photoreal_00001.webp)




![Reddish Brown Technic Brick 1 x 2 [1 Pin Hole]](https://api.brickonomics.net/assets/parts/3700/70/lego_element_4211252_photoreal_00001.webp)




![[No Color/Any Color] Sticker Sheet for Set 42666-1](https://api.brickonomics.net/assets/parts/10113040/9999/lego_element_6542237_photoreal_00001.webp)
![Medium Azure Brick Arch 1 x 6 x 2 - Thin Top without Reinforced Underside [New Version]](https://api.brickonomics.net/assets/parts/15254/322/lego_element_6059179_photoreal_00001.webp)

