Cat Birthday Party & Tree House
Set 42666 · Friends
- Theme
- Friends
- Subtheme
- Pets
- Released
- 2025
- Pieces
- 321
- Minifigures
- 2
- Status
- Active
- Original MSRP
- $30
Current market value$23new / sealed, secondary market
Original MSRP$30at release · 2025
Total return vs MSRP-23%CAGR -23%
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The LEGO® Friends set Cat Birthday Party & Tree House (42666) was released in 2025 with 321 pieces and 2 minifigures at an original price of $30. As a active set it currently trades around $23 on the secondary market — it has depreciated -23% versus its original MSRP (-23% per year).
Tracked in these indices
See the full part-out breakdown, minifig lineup and live chartOpen interactive view →