Lego® Friends 42666 Cat Birthday Party & Tree House

Current best price

LEGO 42666 is currently available from £27.97 incl. shipping at eBay. 2 retailers compared.

Updated 3 November 2026 at 05:01

Lego 42666 price comparison: where is it cheapest?

Prices incl. shipping to the UK ·

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Brickfact may earn a commission when you buy through a merchant link. Commissions do not determine the order of offers. How Brickfact compares prices

iFurther information
The Lego set Cat Birthday Party & Tree House with the set number 42666 is part of the LEGO Friends theme and is recommended for ages 6+. It was released in June 2025. It includes 4 minifigures. The model has 321 pieces, and we estimate it takes around < 1 hour to build.
The set weighs about 0.424 kg. The box measures 19.1 x 26.2 x 6.1 cm. The recommended retail price is £24.99.
Our Brickfact Lego price comparison compares the prices of 2 shops for this set. It is currently cheapest at eBay for £27.97 including shipping. That is £0.09 per piece. Unfortunately, the set is currently not available below its recommended retail price.
If you buy the set from the official Lego store, you also earn 200 Insiders points. You can exchange them for vouchers for future purchases.
The Part-Out-Value (POV) is the sum of the average prices paid on bricklink.com for all parts of this set. It is about £36.30. You save around £8.33 if you buy the complete set at eBay instead of the individual parts on bricklink.com. The current best offer therefore has a POV rate of 1.3: the Part-Out-Value divided by the current best price on Brickfact.

Lego 42666 product data

Set Information

Set ID
42666
Theme
Pieces
321
Building Time
< 1 hour
Age Range
6+
Minifigures
4

Availability

Release
06/2025
Retiring Status
Retiring Soon (12/2026)

Price Information

RRP
£24.99
Insiders Points (for purchase at Lego)
200
Part Out Value
£36.30
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Packaging

Weight
0.424 kg
EAN (GTIN13)
5702017783758

Lego 42666 price history: how has the price changed?

Brickfact has been recording retailer prices since 12/10/2026. Best price so far: £22.73 (10 days ago).

Current best price
£27.97 +12% vs. RRP
Best price since 12/10/2026
£22.73 -9% vs. RRP · 10 days ago

Daily lowest prices at the tracked shops, including shipping. Gaps indicate days with no recorded price. The table lists each shop’s lowest price.

Lowest price per retailer (since 12/10/2026)

Since 12/10/2026, Joybuy was the cheapest on 9 of 17 recorded days.

RetailerCurrentLowest priceDate
Joybuy–£22.7301/11/26
Zatu Games–£23.0431/10/26
Toy Street–£23.0431/10/26
eBay LogoeBay£27.97£27.9331/10/26
Lego.co.uk LogoLego.co.uk£28.9403/11/26

Lowest price per day that Brickfact recorded at the retailers in the price comparison, including shipping where known – as in the comparison above. Amazon offers are not included in the price history.

Lego 42666 market value

Average sale price on secondary marketplaces – not the new price at retailers.

Current market value
£17.69
Market value vs. RRP
−29.2 % £24.99
Range
£16.32 – £18.19
Average
£17.02

Loading price history…

Minifigures from 42666 Cat Birthday Party & Tree House

The Cat Birthday Party & Tree House set includes 4 different minifigures, 2 of which are unique to this set. The combined value of the minifigures is £7.08, which is ~28% of the RRP of this set.
x1
Thumbnail of minifigure frnd0819
Friends Paisley - Bright Light Yellow and Medium Lavender Tank Top, Medium Lavender Shorts, Dark Tan Shoes
Friends
time-logo
2025
#frnd0819
£1.22
i
2 sets
x1
Thumbnail of minifigure frnd0846
Friends Leo - Coral and Magenta Checkered Sleeveless Shirt, Yellow Cropped Trousers, Medium Azure Shoes
Friends
time-logo
2025
#frnd0846
£1.34
Unique
x1
Thumbnail of minifigure frnd819
Friends Paisley - Bright Light Yellow and Medium Lavender Tank Top, Medium Lavender Shorts, Dark Tan Shoes
Friends
time-logo
2025
#frnd819
£3.14
2 sets
x1
Thumbnail of minifigure frnd846
Friends Leo - Coral and Magenta Checkered Sleeveless Shirt, Yellow Cropped Trousers, Medium Azure Shoes
Friends
time-logo
2025
#frnd846
£1.38
Unique

Official Set Description for LEGO 42666 Cat Birthday Party & Tree House

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.

  • A building kit for cat-loving kids – This LEGO® Friends Cat Birthday Party & Tree House toy for girls and boys aged 6 and up comes with 2 minidolls and 5 cat figures for imaginative play
  • Cat tree-house toy – Kids can have lots of fun playing with the 5 cats on the cat tree house, which features a fish-shaped piñata with treats inside, a cat toy, cat grass and a water fountain
  • Create stories with the LEGO® Friends characters – This pretend-play set comes with Leo and Paisley minidolls, 5 catfigures, a buildable cat tree house and a buildable birthday cake scene
  • Cat-themed accessories – Kids can create endless fun stories using the accessories, which include a birthday cake with candle, gifts, banners, cat-shaped balloons, a birthdayhat and cat treats
  • A gift for kids who love cats – This animal toy set makes a great creative gift for girls, boys and cat-lovers aged 6 and up or for anyone who would love to build a cat-themed birthday scene
  • Online show – Inspire more creative-play ideas with other sets (sold separately) and the LEGO® Friends: The Next Chapter online show, where kids can get to know the characters of Heartlake City
  • Let’s tell a friendship story – The LEGO® Friends range of building sets lets kids explore different friendship moments, with lots of opportunities to create their own imaginative stories
  • Measurements – 321-piece set with a main model measuring over 7 in. (18 cm) high, 6 in. (16 cm) wide and 4 in. (10 cm) deep

Building Instruction for LEGO 42666 Cat Birthday Party & Tree House

LEGO 42666 Frequently Asked Questions

How much does LEGO 42666 Cat Birthday Party & Tree House cost?
The lowest price in the Brickfact price comparison is currently £27.97 incl. shipping at eBay. The RRP is £24.99.
Where can I buy LEGO 42666 cheapest?
Brickfact compares 2 retailers. The cheapest offers: eBay (£27.97), Lego.co.uk (£28.94).
Is LEGO 42666 still available?
Yes, but LEGO 42666 is retiring soon. It is still available at 2 retailers in our price comparison.
When was LEGO 42666 cheapest?
Since tracking began on 12/10/2026, the lowest shop price recorded by Brickfact for LEGO 42666 was £22.73 on 24/10/2026 at Joybuy, including shipping. Amazon prices are not included.

All LEGO Friends sets from 2025

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