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Good time to buy € 4.25 below the average price.
View at Bol.com for €24.99
Retailer prices for 42666 are sorted by the lowest delivered price when shipping is known.
Retailer pricesPrices tracked across 67 retailers, updated twice a day.
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Daily lowest price tracked across 40 Dutch retailers. The dotted line marks LEGO's recommended retail price.
Source: daily measurement at 40 Dutch retailers, 14 Dec 2025 – 15 Aug 2026. RRP via LEGO.com.
| Date | Price | Retailer | Stock |
|---|---|---|---|
| €29.95 | Uniblocks | In stock | |
| €24.68 | Proshop | In stock | |
| €25.99 | MediaMarkt | In stock | |
| €23.95 | SpeelGoedNL | In stock | |
| €25.49 | BRICKshop | In stock | |
| €22.99 | Schmets Toys | In stock | |
| €27.99 | Playtoday | In stock | |
| €31.99 | Conrad | In stock | |
| €21.99 | Alternate | In stock | |
| €35.50 | Coolshop | In stock | |
| €29.99 | LEGO.com | In stock | |
| €24.99 | Bol.com | In stock |
Signal is mixed. Small movements are more likely than a big drop.
| Date | Price | Type |
|---|---|---|
| 2026-05-17 | €22.49 | History |
| 2026-05-18 | €21.95 | History |
| 2026-05-19 | €21.95 | History |
| 2026-05-20 | €21.95 | History |
| 2026-05-21 | €21.95 | History |
| 2026-05-22 | €21.95 | History |
| 2026-05-23 | €21.95 | History |
| 2026-05-24 | €21.95 | History |
| 2026-05-25 | €21.95 | History |
| 2026-05-26 | €21.95 | History |
| 2026-05-27 | €21.95 | History |
| 2026-05-28 | €21.95 | History |
| 2026-05-29 | €21.95 | History |
| 2026-05-30 | €22.95 | History |
| 2026-05-31 | €22.95 | History |
| 2026-06-01 | €21.95 | History |
| 2026-06-02 | €21.95 | History |
| 2026-06-03 | €21.95 | History |
| 2026-06-04 | €21.95 | History |
| 2026-06-05 | €21.95 | History |
| 2026-06-06 | €21.95 | History |
| 2026-06-07 | €21.95 | History |
| 2026-06-08 | €21.95 | History |
| 2026-06-09 | €21.95 | History |
| 2026-06-10 | €21.95 | History |
| 2026-06-11 | €20.99 | History |
| 2026-06-12 | €20.99 | History |
| 2026-06-13 | €20.99 | History |
| 2026-06-14 | €20.99 | History |
| 2026-06-15 | €20.99 | History |
| 2026-06-16 | €20.99 | History |
| 2026-06-17 | €20.99 | History |
| 2026-06-18 | €20.99 | History |
| 2026-06-19 | €20.99 | History |
| 2026-06-20 | €20.99 | History |
| 2026-06-21 | €20.99 | History |
| 2026-06-22 | €20.99 | History |
| 2026-06-23 | €20.99 | History |
| 2026-06-24 | €20.99 | History |
| 2026-06-25 | €20.99 | History |
| 2026-06-26 | €20.99 | History |
| 2026-06-27 | €20.99 | History |
| 2026-06-28 | €20.99 | History |
| 2026-06-29 | €20.99 | History |
| 2026-06-30 | €21.95 | History |
| 2026-07-01 | €21.95 | History |
| 2026-07-02 | €21.95 | History |
| 2026-07-03 | €21.95 | History |
| 2026-07-04 | €21.95 | History |
| 2026-07-05 | €21.95 | History |
| 2026-07-06 | €21.95 | History |
| 2026-07-07 | €21.95 | History |
| 2026-07-08 | €21.95 | History |
| 2026-07-09 | €21.95 | History |
| 2026-07-10 | €21.95 | History |
| 2026-07-11 | €21.95 | History |
| 2026-07-12 | €21.95 | History |
| 2026-07-13 | €21.95 | History |
| 2026-07-14 | €21.95 | History |
| 2026-07-15 | €20.99 | History |
| 2026-07-16 | €21.95 | History |
| 2026-07-17 | €20.99 | History |
| 2026-07-18 | €21.99 | History |
| 2026-07-19 | €20.99 | History |
| 2026-07-20 | €20.99 | History |
| 2026-07-21 | €20.99 | History |
| 2026-07-22 | €20.99 | History |
| 2026-07-23 | €21.95 | History |
| 2026-07-24 | €21.95 | History |
| 2026-07-25 | €21.99 | History |
| 2026-07-26 | €21.95 | History |
| 2026-07-27 | €21.95 | History |
| 2026-07-28 | €21.99 | History |
| 2026-07-29 | €21.95 | History |
| 2026-07-30 | €21.95 | History |
| 2026-07-31 | €21.95 | History |
| 2026-08-01 | €21.95 | History |
| 2026-08-02 | €21.95 | History |
| 2026-08-03 | €21.99 | History |
| 2026-08-04 | €21.95 | History |
| 2026-08-05 | €21.95 | History |
| 2026-08-06 | €21.95 | History |
| 2026-08-07 | €21.95 | History |
| 2026-08-08 | €21.95 | History |
| 2026-08-09 | €21.95 | History |
| 2026-08-10 | €21.95 | History |
| 2026-08-11 | €21.95 | History |
| 2026-08-12 | €21.95 | History |
| 2026-08-13 | €21.95 | History |
| 2026-08-14 | €21.95 | History |
| 2026-08-15 | €21.95 | History |
| 2026-09-14 | €21.95 | Forecast |
| 2026-10-14 | €21.95 | Forecast |
| 2026-11-13 | €21.95 | Forecast |
For LEGO Cat Birthday Party & Tree House (42666), we track 19 Dutch retailers, with 19 currently in stock. This set from the Friends theme has 321 pieces, including 2 minifigures and was released in 2025. The current lowest price is €21.95 at Brickmo, 27% below the RRP of €29.99. That works out to €0.07 per piece and a saving of €8.04 versus the RRP. The lowest price ever was €19.59 on 28 Jan 2026 at Bol.com. The set is recommended for builders aged 6 and up. The current price is above that low, so waiting for a drop may pay off. Use price history and stock data to judge whether this is a good time to buy.
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.
We love the LEGO Cat Birthday Party & Tree House set! My daughters (ages 4 and 8) have continued to use these as play sets, which means they get taken apart often. Luckily, assembly is so easy with this set. The different colors of each section of the tree house make it a snap to put back together. My only suggestion would be to make a similar LEGO set that is similar to this for younger ages, as my toddler enjoyed the set most and required supervision due to part size. Still, it's a great set and also makes a great decoration for daughter's homeschool desk. We love the LEGO Cat Birthday Party & Tree House set! My daughters (ages 4 and 8) have continued to use these as play sets, which means they get taken apart often. Luckily, assembly is so easy with this set. The different colors of each section of the tree house make it a snap to put back together. My only suggestion...
2 minifigures according to this set's Rebrickable inventory.
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