LEGO 42666
Cat Birthday Party & Tree House

LEGO 42666 Cat Birthday Party & Tree House box image
Set number
42666
Theme
Friends
Pieces
321 pcs
Year
2025
Used & parts
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“Cat Birthday Party & Tree House” is LEGO® “Friends” theme set number 42666. Released in 2025, it has 321 pieces. With Re:GO you can automatically work out what percentage of this set you can build from the LEGO parts you already own, along with the missing parts and an estimated cost. Use the links below to compare prices on Amazon, Rakuten, Yahoo! Shopping, Mercari and Yahoo! Auctions, and find the best deal on new, used, or individual parts.

Part breakdown 138 types

Color split (most first)
Tan×41
Bright Green×35
Medium Azure×26
Yellowish Green×25
White×18
Bright Pink×18
Reddish Brown×17
Lime×15
Blue×12
Bright Light Orange×11
Coral×11
Dark Orange×11
Main parts (most used first)
32607 Plant, Plate 1 x 1 Round with 3 Leaves
Yellowish Green · ×25
2423 Plant, Leaves 4 x 3
Lime · ×8
98138pr0056 Tile Round 1 x 1 with Animal Track Print
Medium Nougat · ×6
32062 Technic Axle 2 Notched
Red · ×6
25214 Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end
Tan · ×6
37695 Plant, Stem with 3 Leaves and Bottom Pin
Bright Green · ×6
37762 Equipment Candlestick
Reddish Brown · ×6
59443 Technic Axle Connector Smooth [with x Hole + Orientation]
Tan · ×6
59900 Cone 1 x 1 [Top Groove]
Tan · ×6
87580 Plate Special 2 x 2 with Groove and Center Stud (Jumper)
Medium Azure · ×5
3005 Brick 1 x 1
Medium Azure · ×5
3023 Plate 1 x 2
Dark Orange · ×5
78258 Bar 2L with Stop in Center
Tan · ×4
88072 Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm]
Tan · ×4
32607 Plant, Plate 1 x 1 Round with 3 Leaves
Bright Green · ×4
18674 Plate Special Round 2 x 2 with Center Stud (Jumper Plate)
Dark Pink · ×4
24866 Plant, Flower, Plate Round 1 x 1 with 5 Petals
Bright Green · ×4
3069b Tile 1 x 2 with Groove
Medium Azure · ×4
53451 Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small
Bright Green · ×4
6141 Plate Round 1 x 1 with Solid Stud
Bright Pink · ×4
65509 Plate Special 2 x 4 with Groove and Two Center Studs (Jumper)
Bright Green · ×4
80326 Flag 2 x 2 Square, Flared Clip Edge [Thick Clips]
White · ×3
4477 Plate 1 x 10
Medium Azure · ×3
32028 Plate Special 1 x 2 with Door Rail
Tan · ×3

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