Friends
Puppy Playground
from £7
£0.11/pc
🏆 All-time low
![Cat Birthday Party & Tree House]()
Friends
#42666 · EAN 5702017783758
321 pieces · 2 minifigs · Released 2025
A creative toy building set for cat-lovers
£24
Cheapest at LEGO · + £3 shipping (£27 total) · ✓ In stock
✓ 1 retailers
✓ Updated daily
321
Pieces
2
Minifigs
2025
Year
≈ £0.07 per piece · 321 pieces
68
Heist
Great deal
Lowest in 6 months
Few sellers left
Compare prices
Prices at 1 retailers — updated daily. How we track these prices.
LEGO
Best price
Official
● In stock · + £3 shipping (£27 total)
£24
Price history — last 90 days
Lowest price across listed retailers.
Lowest price
Specifications
Set #
42666
Theme
Friends
Pieces
321
Minifigs
2
Year
2025
Status
In production
All-time low
£24
Price per piece
£0.07
EAN
5702017783758
Cheapest Friends sets
Cat Birthday Party & Tree House (LEGO set 42666) is a LEGO Friends set with 321 pieces. Compare LEGO prices for it across retailers and check the full price history before you buy.
The best price for Cat Birthday Party & Tree House right now is £24 across 1 retailers — matching the official LEGO RRP of .
The lowest daily price has held steady around £24 over the past month.
Brickheist tracks the price of Cat Birthday Party & Tree House daily and keeps up to 12 months of price history. Right now it's at its all-time low of £24 — a great moment to buy.
Frequently asked questions
How much does Cat Birthday Party & Tree House cost?
The cheapest tracked price for Cat Birthday Party & Tree House is £24, compared across 1 retailers and updated every day on Brickheist.
What is the lowest price for Cat Birthday Party & Tree House?
The all-time low we've recorded for Cat Birthday Party & Tree House (set 42666) is £24. The 12-month price history is shown on this page so you can spot a genuine deal.
Where can I buy Cat Birthday Party & Tree House the cheapest?
Brickheist compares Cat Birthday Party & Tree House across LEGO retailers so you can buy at the lowest price. See the retailer table above for live prices, stock and shipping.
£24
at LEGO