#42666Friends2025
LEGO Cat Birthday Party & Tree House
Set #42666 · 2025 · 321 pieces · Moderate build
Set Details
- Set Number
- 42666
- Name
- Cat Birthday Party & Tree House
- Theme
- Friends
- Year
- 2025
- Pieces
- 321
- Complexity
- Moderate
- Build Time
- 1-2 hours
- Ages
- 8+
- Type
- Play-focused
About LEGO Cat Birthday Party & Tree House
LEGO Cat Birthday Party & Tree House (set #42666) is a detailed build with 321 pieces from the Friends theme, released in 2025. The Friends line features story-driven sets featuring the characters of Heartlake City. This is a moderate-level build suitable for ages 8+, with an estimated build time of 1-2 hours.
Finding Instructions
Building instructions for LEGO Cat Birthday Party & Tree House (#42666) are available as a free PDF on LEGO.com. You can also upload a photo of this set to LegoFinder to identify it and access the instructions directly.
Cat Birthday Party & Tree House FAQ
More Friends Sets
Also Released in 2025
Need Instructions for Cat Birthday Party & Tree House?
Upload a photo of your LEGO Cat Birthday Party & Tree House set and get the building instructions PDF in seconds.
Upload a Photo Now