LEGO 42661 Costume Party with Unicorn & Fairy: Set Guide

Specifications

Set number	42661
Release year	2025
Piece count	262
Minifigures	4
Theme	Friends
Building instructions	Download the instructions on lego.com

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LEGO Friends set 42661, Costume Party with Unicorn & Fairy, depicts a costume party with a unicorn, a fairy, a stage and a DJ booth. Released in 2025 in the Friends theme, it contains 262 pieces.

This model belongs to the LEGO Friends theme and focuses on a shared party scene. Its subject combines costumes, music and small celebration accessories, giving the set a social setting rather than a single main building or vehicle. It fits the theme’s character led storytelling format.

Listed elements include a stage, a DJ booth, Churro the cat, a horse figure and party related accessories.

It is mainly suited to narrative play, with the costumes giving each character an immediate role in the scene. It can also be displayed as a compact Friends party vignette or combined with other Friends sets about leisure and everyday activities. Within the theme, its identity comes from the costume party and music setup.

Inventory of set 42661

The inventory of set 42661 lists 262 pieces, spare parts excluded: 138 different lots (one shape in one color) for 107 part shapes. The box also contains 34 spare parts, for small elements that are easy to lose.

Colors of set 42661

Main color: medium azure, making up 18% of the parts, followed by white (14%) and bright pink (9.9%).

Color	Parts	Share
Medium Azure	48	18%
White	36	14%
Bright Pink	26	9.9%
Vibrant Yellow	14	5.3%
Dark Purple	12	4.6%
Light Aqua	12	4.6%
Black	11	4.2%
Bright Green	10	3.8%
Trans-Dark Pink	9	3.4%
Yellowish Green	8	3.1%
Other colors (28)	73	28%

Part types

Type	Parts	Share
Plates Special	69	26%
Plates	29	11%
Tiles Round and Curved	27	10%
Bars, Ladders and Fences	20	7.6%
Tiles Special	19	7.3%
Tiles	16	6.1%

Most common parts in set 42661

Part	Color	Quantity
Plate Special 2 x 2 with Groove and Center Stud (Jumper) 87580	Bright Pink	10
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) 15573	Medium Azure	8
Tile Special Round 1 x 1 with Hollow Bar 20482	Yellowish Green	8
Tile Round 1 x 1 Half Circle 24246	Dark Purple	6
Tile Round 1 x 1 Half Circle 24246	Medium Azure	6
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Half Hollow Anti-stud] - Updated Version 4304	Light Aqua	6
Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] 60897	Medium Azure	6
Bar, Angled with 1 x 1 Round Plate / Stud on End 65578	Trans-Clear	6
Tile 1 x 2 with Groove 3069b	Bright Pink	5
Plate 2 x 6 3795	Vibrant Yellow	5

78 of the 107 part shapes in this set have their own page on Setopedia, with their colors, element numbers and the other sets that use them. See all LEGO parts

Exclusive parts in set 42661

14 part shapes in set 42661 appear in no other set in the catalog, most often printed elements, stickers or molds specific to the model. If one gets lost, you will need to look for it individually, for example on BrickLink, rather than in another set. The table lists 8. Counting colors, 18 lots in the set are not found in any other set.

Part	Color
Animal, Horse with Raised Leg, Dark Pink Mane and Tail, Dark Azure Eyes print 69830pr0008	White
Foil Sheet for Set 42661-1 - Fairy/Butterfly Wings 10112446a
Minidoll Hips and Short Skirt with Light Nougat Legs, Lavender Sandals print 2241c01pr0030	Bright Pink
Minidoll Head Dark Red Eyebrows, Bright Pink Eyeshadow, Bright Light Blue Eyes, Crooked Smile 92198pr0071	Light Nougat
Minidoll Torso with Left Limb Reduction, Light Nougat Arms and Hand with Black/Yellow Striped Top (Bee) print 100811c01pr0007	Light Nougat
Minidoll Head with Dark Orange Eyebrows, Black Fly Goggle print 92198pr0073	Light Nougat
Minidoll Hips and Fishtail (Mermaid) with Satin Trans-Light Blue Tail print 16530c01pr0005	Medium Azure
Minidoll Torso Boy with Warm Tan Arms and Hands with Light Aqua Shrt, Gold Belt, Star, Shells On Necklace print 11408c07pr0011	Warm Tan

No similarly sized set supplies more than a quarter of its parts: set 42661 relies on a little-shared assortment.

Size of set 42661 within its line

With 262 pieces, set 42661 ranks #209 out of 531 Friends sets in our database, which have an average of 308 parts. Among the 625 sets released in 2025, it ranks #341.

Included minifigures

Frequently asked questions

How many pieces does LEGO set 42661 Costume Party with Unicorn & Fairy have?

LEGO set 42661 Costume Party with Unicorn & Fairy has 262 pieces. It was released in 2025 as part of the Friends theme.

What year was LEGO set 42661 released?

Set 42661 Costume Party with Unicorn & Fairy was released in 2025 and belongs to the Friends theme.

Which minifigures are included in set 42661?

Number of minifigures in LEGO set 42661 Costume Party with Unicorn & Fairy: 4. Their names and quantities are listed in the “Included minifigures” section.

Where can I find the building instructions for set 42661?

The instructions for LEGO set 42661 Costume Party with Unicorn & Fairy can be downloaded free as a PDF from the official lego.com website, under “Building Instructions”, by entering the number 42661.

What is the main color of LEGO set 42661?

Medium azure, with 48 out of 262 pieces, or 18%. Next come white (14%) and bright pink (9.9%).

How many different parts does set 42661 contain?

Set 42661 has 138 different lots (one shape in one color), covering 107 part shapes. Most common part: Plate Special 2 x 2 with Groove and Center Stud (Jumper) in bright pink, with 10 copies.

Does LEGO set 42661 contain any exclusive parts?

Yes: 14 part shapes exist in no other set, for example: Animal, Horse with Raised Leg, Dark Pink Mane and Tail, Dark Azure Eyes print.

Which mini-dolls are included in LEGO Friends 42661?

The set includes Autumn - Bee Costume, Paisley - Fairy Costume, Leo - Bunny Costume and Olly - Merman Costume.