DE
LegoLEGO® Friends

Lego® Cat Birthday Party & Tree House

Lowest price right now €19.90 at smythstoys, 34% below RRP, 21 shops compared.

Lego Cat Birthday Party & Tree House (42666) – Produktfoto freigestellt
Set #
42666
Parts
321
Minifigs
2
Price/part
6.4 ct
Release
2025
Age
6+

Where is Cat Birthday Party & Tree House cheapest right now?

Shipping to Germany
21 shops checkedIndependently sorted
Used
20,19€BEST PRICE
0,20 € below cheapest new price
free shippingincl. VATfrom  
20,19 €Usedfree shipping
  • New
    20,39€
    free shippingincl. VATfrom  
    20,39 €Newfree shipping
  • New
    20,39€
    free shippingincl. VATfrom  | 1 to 3 days
    20,39 €Newfree shipping · 1 to 3 days
  • New
    23,85€
    incl. 3,95 € shippingincl. VATfrom  | 1 to 3 days
    23,85 €Newincl. 3,95 € shipping · 1 to 3 days
  • New
    25,76€
    free shippingincl. VATfrom  | 2 to 4 days
    25,76 €Newfree shipping · 2 to 4 days
Price check · in short

What does Lego® Cat Birthday Party & Tree House (42666) currently cost?

On VERObricks, Lego® Cat Birthday Party & Tree House (Set No. 42666) is currently listed by 21 shops across 22 offers. The lowest new price in the VERObricks comparison is 20,39 € (amazon.de), including free shipping. Other new offers range up to 35,59 €. Used, the set is available from 20,19 € (amazon.de). The manufacturer's RRP is 29,99 €. The current price per brick is 6,4 cents.

Notes on prices & affiliate links
Displayed prices may differ from actual offers. We update prices regularly, but offers on the linked pages may change quickly. Please note that we earn a commission on some qualified purchases made through partner links (e.g., from Amazon, eBay, or other shops). This only applies to links used within affiliate programs. There are no additional costs for you, and we also provide non-affiliate links to ensure a comprehensive overview of available offers.

Has Cat Birthday Party & Tree House ever been cheaper?

Current
20,39 €
New, best shop
30-day low
20,39 €
on 13. Aug. 2026 · alternate.de
Usual at dealers
20,39 €
90-day median, final price
All-time low
20,39 €
on 31. Juli 2026 · alternate.de

Set details

At a glance
Brand
Lego
Partcount
321
Minifigures
2
1 excl.
Age
6+
Release / EOL
2025 – 2026
RRP
29,99 €
Price per Part
6.4 ct
good value
Building instructionsPDF from the manufacturer
Technical data9 entries

Product

Name
Cat Birthday Party & Tree House

Dimensions

Product weight
0,2 kg
Packaging width
26,2 cm
Packaging height
6,1 cm
Packaging length
19,1 cm
Packaging weight
0,5 kg

Identification

MFR
42666
EAN
57020177837585702017949581
SKU
42666

DescriptionManufacturer text

A creative toy building set filled with feline fun for girls, boys and cat-lovers aged 6 and up, with 2 minidolls and 5 cat figures.

It’s Churro the cat’s birthday and you’re invited to join the celebrations! Leo and Paisley are here too, plus 4 of Churro’s kitty friends, who have brought gifts for the birthday cat. The pets play in the cat tree house, where there’s a fish-shaped piñata, a cat toy, cat grass and a water fountain. Then the cats sit at the rotating table to enjoy Churro’s birthday cake. Happy birthday Churro!

Lego Cat Birthday Party & Tree House

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 cat figures, a buildable cat tree house and a buildable birthday cake scene

Lego Cat Birthday Party & Tree House

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

  1. 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

  2. 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

Which minifigures are in Cat Birthday Party & Tree House?

The set contains 2 minifigures, 1 of them exclusive to this set.

  • Paisley - Bright Light Yellow Top, Medium Lavender SkirtPaisley - Bright Light Yellow Top, Medium Lavender Skirtin 2 sets
  • Leo - Red Shirt, Yellow ShortsLeo - Red Shirt, Yellow ShortsExclusive

Frequently Asked Questions

Where can you buy Lego® Cat Birthday Party & Tree House?

New stock is available at smythstoys, amazon.de, alternate.de, alza, brickmo, idee-spiel, duo-shop, lucky-bricks, otto.de, baur, mediamarkt, saturn, amazon.de-mp, coolshop, thalia.de, ebay, brickstore, proshop, galaxus-de, muller, toymi (21 shops). Used copies are offered by amazon.de. Free shipping is available at amazon.de, alternate.de, ebay. VERObricks compares all prices in real time and always shows you the lowest offer — for new and used stock, with shipping cost comparison.

Was Cat Birthday Party & Tree House ever cheaper? Price history & all-time low

VERObricks tracks the price history of Lego® Cat Birthday Party & Tree House across all shops. The historical low for new is 20,39 €. The highest observed new price was 32,14 € — a range of 11,75 €. The current price of 20,39 € is at or near the historical low — a great time to buy. The lowest used price historically was 19,95 €. The price trend is currently downward — the price has fallen recently. With the VERObricks price alert you'll be notified instantly when the price reaches your target.

What is Lego® Cat Birthday Party & Tree House? Contents, parts & details

Lego® Cat Birthday Party & Tree House is a set by Lego from the "LEGO® Friends" theme (Set No. 42666, EAN: 5702017783758). According to the VERObricks database, the set includes 321 parts, 2 minifigures, Recommended age 6+. Manufacturer description: "A creative toy building set filled with feline fun for girls, boys and cat-lovers aged 6 and up, with 2 minidolls and 5 cat figures." On VERObricks you can find the set in these categories: LEGO® Friends, Animals, Holidays, Kids.

Which minifigures are included in Lego® Cat Birthday Party & Tree House?

According to the Rebrickable inventory, Lego® Cat Birthday Party & Tree House contains 2 minifigures: Paisley - Bright Light Yellow Top, Medium Lavender Skirt, Leo - Red Shirt, Yellow Shorts. 1 figure is exclusive to this set: Leo - Red Shirt, Yellow Shorts. Exclusive figures often keep a set's value stable after retirement; see the price history and used offers above.

When was Lego® Cat Birthday Party & Tree House released and how long will it stay available?

Lego® Cat Birthday Party & Tree House was released in June 2025. According to the manufacturer's planning, the set retires at the end of 2026 (EOL, end of life). While it is in regular stock, keep an eye on the price history; after retirement, new copies come from remaining stock only and prices often rise. The official building instructions are available as 2 PDF files directly from the manufacturer, linked in the set details section.

Can you also buy Cat Birthday Party & Tree House used?

According to VERObricks, Lego® Cat Birthday Party & Tree House is available used from 20,19 € at amazon.de. Compared to the lowest new price (20,39 €), you save 0,20 € — that's 1% off. The current used price is near the historical low of 19,95 € — a good opportunity. Tip: Used building block sets are a sustainable and budget-friendly alternative. VERObricks compares all used offers from various retailers for you.

Is Cat Birthday Party & Tree House worth it at the current price?

At the current VERObricks best price of 20,39 € for 321 parts, that works out to 6,4 cents per part. That's in the typical range for Lego sets. Licensed themes and special parts can raise the price per part. On top of that: according to the VERObricks price history, the current price is at the historical all-time low.