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Retiring soonAges 6+

Aliya's Baby Sister's Playroom (42645)

Name: Aliya's Baby Sister's Playroom
Brand: LEGO
SKU: 42645
Rating: 4.7 (4 reviews)

LEGO.com RRP:Sold Out

£14.99

LEGO.com

★4.7

(4 reviews)

🧱 125 pieces - : £0.12

Available From

LEGO.comOfficial

£14.99

Price updated: 10 May 2026

View on LEGO →

Building Instructions Brickset

Price Analysis

Lowest Price Ever

£10.49

at LEGO.com · Jan 2026

Average Price (12mo)

£11.49

Current vs Average

+30.5%

Above average

Best Month to Buy

January

Value Score

8.0/10

Price-per-piece vs theme avg

The lowest price we've recorded for Aliya's Baby Sister's Playroom is £10.49 at LEGO.com in January 2026. The current price is 30.5% above the 12-month average of £11.49. Historically, January tends to offer the best prices for this set.

Price History & Buying Verdict

VerdictBuy now

•This set is marked as retiring soon by LEGO — once production stops, prices on the secondary market typically rise significantly.
•It's now sold out at LEGO.com, so any in-stock retailer listing is the only way to buy at retail price.
•The current price is 30.5% above the 12-month average of £11.49, so waiting for a drop may pay off.
•On price-per-piece, this is one of the better-value sets in the Friends range (value score 8.0/10 vs theme average).

We've been tracking the price of LEGO Friends Aliya's Baby Sister's Playroom (125 pieces) for 116 days, recording 9 data points across LEGO.com and major UK retailers. Over that period the price has dropped 0 times below previous levels, with the lowest price ever recorded being £10.49 at LEGO.com in January 2026.

The 12-month average sale price for set 42645 works out to £11.49 — that's 23.3% below the LEGO RRP of £14.99. The highest price we recorded across our tracked retailers was £14.99, giving a range of about £4.50 between the cheapest and most expensive observation.

Historically, January has produced the lowest average prices for Aliya's Baby Sister's Playroom, so if you're not in a hurry it's worth bookmarking the page closer to that window.

Want to see how LEGO Aliya's Baby Sister's Playroom (set 42645) compares against other sets? Browse the best-value LEGO sets or check the full price-history tracker.

Description

Aliya's Baby Sister's Playroom (42645) is a LEGO Friends set with 125 pieces, with an RRP of £14.99. With a value score of 8.0/10, this set offers excellent value compared to other Friends sets.

This pretend-play toy set for kids aged 6 years old and up lets girls and boys create endless babysitting friendship stories. The LEGO® Friends Aliya’s Baby Sister’s Playroom (42645) creative toy set comes with 2 LEGO Friends mini-dolls, a baby figure and lots of accessories for role play.

Inspire kids to build the playroom, where Aliya and Liann are caring for Aliya’s baby sister, Amalia. There’s everything kids need to create friendship stories. They can feed the baby at the table – a clever flip function shows just how much mess a baby can make at mealtimes! When it’s time for a nap, there’s a crib for Amalia. Playtime is catered for too, with a slide, playmat, ball pit, a rocking duck ride and a cute plushie-style LEGO piece. Then the friends take Amalia for a walk in the baby stroller toy.

Discover other building playsets (sold separately) in the LEGO Friends universe, with lots more friendship stories to uncover. This set comes with the LEGO Builder app for intuitive building.

Features

A kids’ pretend-play toy packed with stories – Aliya’s Baby Sister’s Playroom for girls and boys aged 6 and up comes with 2 mini-dolls, a baby figure, a toy stroller and accessories for creative play
Social-emotional toy – This set helps kids develop their social skills as they help Aliya and Liann care for Aliya’s baby sister, Amalia
Includes 2 mini-dolls and a baby figure – The set comes with Aliya and Liann mini-dolls, plus a baby sister figure and accessories for creative fun
Lots of extras for role play – Accessories include a bottle, spoon, ball pit with balls, duck ride-on toy, a stroller and a plushie toy in LEGO® form
A gift for kids aged 6 years old and up – This fun toy set makes a great gift idea for kids who enjoy pretend play and creating 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
Measurements – 125-piece set with a playroom model measuring over 2 in. (5 cm) high, 5 in. (13 cm) wide and 2.5 in. (7 cm) deep

Frequently Asked Questions about Aliya's Baby Sister's Playroom

What is the best price for LEGO Aliya's Baby Sister's Playroom (Set 42645)?

LEGO Aliya's Baby Sister's Playroom (Set #42645) is currently priced at £14.99 on LEGO.com. We continuously monitor prices across multiple UK retailers to find you the best deals.

How many pieces are in LEGO set 42645?

LEGO Aliya's Baby Sister's Playroom (Set #42645) contains 125 pieces. At the LEGO.com price of £14.99, that works out to approximately 12.0p per piece.

What age is LEGO Aliya's Baby Sister's Playroom suitable for?

LEGO Aliya's Baby Sister's Playroom (Set #42645) 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 Aliya's Baby Sister's Playroom?

You can download the official building instructions for LEGO Aliya's Baby Sister's Playroom (Set #42645) 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 Aliya's Baby Sister's Playroom in the UK?

LEGO Aliya's Baby Sister's Playroom (Set #42645) is available from LEGO.com at £14.99. We're monitoring other UK retailers for availability. Check our recent price drops for updates.

What is the lowest price ever recorded for LEGO Aliya's Baby Sister's Playroom?

The lowest price we've recorded for LEGO Aliya's Baby Sister's Playroom (Set #42645) is £10.49 at LEGO.com in January 2026. That's 30% off the LEGO RRP of £14.99. Track the latest movements on our LEGO price history page.

Is LEGO Aliya's Baby Sister's Playroom being discontinued or retiring soon?

LEGO Aliya's Baby Sister's Playroom (Set #42645) is currently sold out on LEGO.com. We're not currently seeing it in stock at any tracked UK retailer. Once a set retires, secondary-market prices typically rise above the original RRP. Browse our list of retiring LEGO sets to see what else is on the way out.

Is LEGO Aliya's Baby Sister's Playroom good value for money?

Comparing piece-count to price across the LEGO Friends theme, this set scores 8.0 / 10 for value. That works out to about 12.0p per piece. That puts Aliya's Baby Sister's Playroom in the top tier of Friends sets for raw build value — you're paying noticeably less per brick than the theme average. Compare against other contenders on our best-value LEGO sets page.