Costume Party with Unicorn & Fairy (42661)
Prices last checked: 29 July 2026 at 19:43
Available From
Price Analysis
Lowest Price Ever
£19.99
at Amazon UK · Jul 2026
Average Price (12mo)
£27.55
Current vs Average
-5.5%
Below average
Price Trend
Falling
Last 30 days
Best Month to Buy
July
Value Score
6.0/10
Price-per-piece vs theme avg
The lowest price we've recorded for Costume Party with Unicorn & Fairy is £19.99 at Amazon UK in July 2026. The current price is 5.5% below the 12-month average of £27.55. Prices have been trending downward recently — a good time to buy. Historically, July tends to offer the best prices for this set.
Price History & Buying Verdict
- •The current best price of £19.99 is within 5% of the all-time low we've recorded (£19.99 at Amazon UK, July 2026).
- •Prices have trended downward over the last 30 days — there's a chance of a further dip.
- •A recent price drop of about £5.00 was recorded in the last 30 days.
We've been tracking the price of LEGO Friends Costume Party with Unicorn & Fairy (261 pieces) for 195 days, recording 88 data points across LEGO.com and major UK retailers. Over that period the price has dropped 17 times below previous levels, with the lowest price ever recorded being £19.99 at Amazon UK in July 2026.
The 12-month average sale price for set 42661 works out to £27.55 — that's 21.3% below the LEGO RRP of £34.99. The highest price we recorded across our tracked retailers was £35.00, giving a range of about £15.01 between the cheapest and most expensive observation.
Amazon UK has run the most price drops on this set in the period we've tracked, making it the retailer most worth watching for short-term deals. Historically, July has produced the lowest average prices for Costume Party with Unicorn & Fairy, so if you're not in a hurry it's worth bookmarking the page closer to that window. Prices have been trending downward over the last 30 days.
Want to see how LEGO Costume Party with Unicorn & Fairy (set 42661) compares against other sets? Browse the best-value LEGO sets or check the full price-history tracker.
Description
Costume Party with Unicorn & Fairy (42661) is a LEGO Friends set with 261 pieces, with an RRP of £34.99. It's currently available from £19.99 at Amazon UK — 43% below the RRP, saving you £15.00. Prices have been falling over the last 30 days.
Here’s a kids’ building kit packed with storytelling inspiration. The LEGO® Friends Costume Party with Unicorn & Fairy (42661) set for girls and boys aged 6 and up comes with 4 LEGO Friends minidolls, a cat figure and a horse figure. It also features lots of cute party accessories for pretend play.
Kids can create their own fun stories and act out social situations as the friends try on their costumes. Autumn is dressing as a bumblebee and Olly is a merman. Churro the cat joins in the fun in a magician costume with Leo as his white bunny. Paisley wears a fairy costume and Periwinkle the horse transforms into a unicorn. The friends enjoy a party with a stage, DJ booth and snacks. There’s also a photo booth with fun accessories where the friends can pose for pictures.
Discover more friendship toys and gifts (sold separately) in the LEGO Friends universe. This set comes with the LEGO Builder app for intuitive building. Here kids can zoom in, rotate models and track progress as they build.
Features
- A building kit to inspire imaginative play – This kids’ LEGO® Friends Costume Party with Unicorn & Fairy includes a fun party scene with a DJ booth to delight girls and boys aged 6 and up
- 4 minidolls and 2 LEGO® animal figures – Get the party started with Autumn, Olly, Leo, Paisley and their pets as they dress up as a bumblebee, merman, magician, bunny, fairy and a unicorn
- Inspire creative play – This set is packed with fun details and cute accessories to encourage imaginative storytelling as kids make up adventures and act out social situations for the characters
- Costume-party accessories – This LEGO® toy comes with lots of accessories to spark role play, including a slushie machine, cakes, drinks, balloons, hats, a merman’s trident, a fairy wand and more
- A gift for kids who love creative toys – This building playset makes a great birthday gift or anytime treat for boys and girls who enjoy telling their own friendship stories
- Online show – Inspire more creative-play ideas with other sets (sold separately) and the LEGO® Friends: The Next Chapter online show, where kids can get to know the characters of Heartlake City
- A helping hand – Discover intuitive instructions in the LEGO® Builder app, where builders can zoom in and rotate models in 3D, track their progress and save sets as they develop new skills
- Measurements – 261-piece set with a main model measuring over 3 in. (8 cm) high, 9.5 in. (25 cm) wide and 2 in. (5 cm) deep
Frequently Asked Questions about Costume Party with Unicorn & Fairy
What is the best price for LEGO Costume Party with Unicorn & Fairy (Set 42661)?
The best current price for LEGO Costume Party with Unicorn & Fairy (Set #42661) is £19.99 at Amazon UK. This is £15.00 cheaper than the official LEGO RRP of £34.99. Price last verified on 29 July 2026.
How much can I save on LEGO Costume Party with Unicorn & Fairy?
You can save £15.00 (43% off) on LEGO Costume Party with Unicorn & Fairy by buying from Amazon UK instead of LEGO.com. The official RRP is £34.99, but you can get it for just £19.99. Browse more top discounts.
How many pieces are in LEGO set 42661?
LEGO Costume Party with Unicorn & Fairy (Set #42661) contains 261 pieces. At the best available price of £19.99, that works out to approximately 7.7p per piece.
What age is LEGO Costume Party with Unicorn & Fairy suitable for?
LEGO Costume Party with Unicorn & Fairy (Set #42661) is recommended for ages 6+. This set is part of the LEGO Friends theme. View all Friends sets and deals.
Where can I find the building instructions for LEGO Costume Party with Unicorn & Fairy?
You can download the official building instructions for LEGO Costume Party with Unicorn & Fairy (Set #42661) for free from LEGO.com. Download the building instructions here. The instructions are available as a PDF and can be viewed on any device.
Where can I buy LEGO Costume Party with Unicorn & Fairy in the UK?
Is LEGO Costume Party with Unicorn & Fairy on sale right now?
Yes! While not on sale at LEGO.com, you can get LEGO Costume Party with Unicorn & Fairy for £19.99 at Amazon UK - that's 43% below the official RRP of £34.99. Browse more best offers.
What is the lowest price ever recorded for LEGO Costume Party with Unicorn & Fairy?
The lowest price we've recorded for LEGO Costume Party with Unicorn & Fairy (Set #42661) is £19.99 at Amazon UK in July 2026. That's 43% off the LEGO RRP of £34.99. Track the latest movements on our LEGO price history page.
Is LEGO Costume Party with Unicorn & Fairy good value for money?
Comparing piece-count to price across the LEGO Friends theme, this set scores 6.0 / 10 for value. That works out to about 7.7p per piece. That's roughly in line with the Friends theme average. Compare against other contenders on our best-value LEGO sets page.
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