Product Overview
LEGO Friends Cat Birthday Party & Tree House 42666 is a 321-piece building set centered on a cat birthday celebration. The set provides a buildable cat tree house together with character figures and accessories intended for imaginative storytelling after construction is complete.
The configuration includes two LEGO Friends minidolls, Leo and Paisley, along with five cat figures. The play environment incorporates a rotating table, fish-shaped piñata, cat toy, cat grass, water fountain, litter box, birthday cake, gifts, banners, balloons, and additional party accessories.
The set is intended for builders ages six years and older and does not require batteries. Set number 42666 identifies this configuration. The exact retail set is documented with UPC 673419402125 and EAN 5702017783758.
Product Information
Identification
| Field | Value |
|---|---|
| Brand | LEGO |
| Theme | LEGO Friends |
| Product Name | Cat Birthday Party & Tree House |
| Set Number | 42666 |
| UPC | 673419402125 |
| EAN | 5702017783758 |
Physical
| Field | Value |
|---|---|
| Piece Count | 321 |
| Minidolls | 2 |
| Cat Figures | 5 |
| Primary Material | Plastic |
| Approximate Package Weight | 433 g |
Product Identifier Summary
LEGO set 42666, UPC 673419402125, and EAN 5702017783758 identify the LEGO Friends Cat Birthday Party & Tree House configuration.
Common Uses
The set is intended for construction play, imaginative storytelling, character-based role play, fine-motor activity, creative building, and display after assembly.
Maintenance & Care
Store loose LEGO elements in a container when not in use. Plastic elements can be cleaned gently with mild water below high temperatures and should be allowed to air dry completely. Electronic cleaning equipment or excessive heat should be avoided.
Safety
The set contains small parts and is intended for ages six years and older. Small components can present a choking hazard to younger children.
Technical Specifications
| Specification | Value |
|---|---|
| Set Number | 42666 |
| Theme | Friends |
| Piece Count | 321 |
| Recommended Minimum Age | 6 years |
| Minidolls | 2 |
| Cat Figures | 5 |
| Battery Requirement | None |
Product History
LEGO Friends set 42666 was introduced in 2025 as part of the LEGO Friends product range.
Key Features
- 321-piece building set
- Buildable cat tree house
- Two LEGO Friends minidolls
- Five cat figures
- Rotating party table
- Birthday and cat-care accessories
- No batteries required
Package Contents
- 321 LEGO building elements
- Leo minidoll
- Paisley minidoll
- Five cat figures
- Cat tree house components
- Birthday-party accessories
- Building instructions
Compatibility
The bricks and elements use the standard LEGO building system and can generally be combined with compatible LEGO system elements from other sets.
FAQs
How many pieces are included?
The set contains 321 pieces.
How many cats are included?
Five cat figures are documented in this set.
Which minidolls are included?
Leo and Paisley are included.
Does the set require batteries?
No.
Buying Considerations
LEGO Friends includes many animal-themed building sets. Set number 42666, UPC 673419402125, and EAN 5702017783758 should be verified to distinguish this exact Cat Birthday Party & Tree House set.
Customer Feedback Summary
Public feedback commonly highlights the cat figures, detailed party accessories, opportunities for imaginative storytelling, and manageable build size for younger LEGO Friends builders.
Related Products
- LEGO Friends animal-themed sets
- LEGO Friends Heartlake City sets
- LEGO pet and tree-house building sets
Last Updated
September 12, 2026
iGiftcardz is an independent product information website. We provide original product research, specifications, compatibility information, model numbers, and buying guides based on publicly available information. iGiftcardz is not affiliated with, endorsed by, sponsored by, or associated with any manufacturer, retailer, or marketplace unless expressly stated. Product names, trademarks, and brand names are the property of their respective owners and are used solely for identification and reference purposes.
Review this product
-
Review this product