Ages 18+

The Evolution of STEM (21355)

Name: The Evolution of STEM
Brand: LEGO
SKU: 21355
Rating: 4.6 (4 reviews)

Prices last checked: 30 April 2026 at 18:01

LEGO.com RRP:

£69.99

LEGO.com

★4.6

(4 reviews)

🧱 879 pieces - : £0.08

Available From

Best Deal

£70.00

Price checked: 30 Apr 2026

View Deal →

LEGO.comOfficial

£69.99

Price updated: 26 Apr 2026

View on LEGO →

Building Instructions Brickset

Price Analysis

Lowest Price Ever

£69.99

at LEGO.com · Jan 2026

Average Price (12mo)

£69.99

Current vs Average

0.0%

Near average

Price Trend

Stable

Last 30 days

Best Month to Buy

January

Value Score

10.0/10

Price-per-piece vs theme avg

The lowest price we've recorded for The Evolution of STEM is £69.99 at LEGO.com in January 2026. The current price is close to the 12-month average of £69.99. Historically, January tends to offer the best prices for this set.

Price History & Buying Verdict

VerdictGood time to buy

•The current best price of £70.00 is within 5% of the all-time low we've recorded (£69.99 at LEGO.com, January 2026).
•On price-per-piece, this is one of the better-value sets in the Ideas range (value score 10.0/10 vs theme average).

We've been tracking the price of LEGO Ideas The Evolution of STEM (879 pieces) for 102 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 £69.99 at LEGO.com in January 2026.

The 12-month average sale price for set 21355 works out to £69.99 — that's 0% above the LEGO RRP of £69.99. The highest price we recorded across our tracked retailers was £70.00, giving a range of about £0.01 between the cheapest and most expensive observation.

Historically, January has produced the lowest average prices for The Evolution of STEM, so if you're not in a hurry it's worth bookmarking the page closer to that window.

Want to see how LEGO The Evolution of STEM (set 21355) compares against other sets? Browse the best-value LEGO sets or check the full price-history tracker.

Description

The Evolution of STEM (21355) is a LEGO Ideas set with 879 pieces, with an RRP of £69.99. It's currently available from £70.00 at argos_uk. Prices have been stable over the last 30 days. With a value score of 10.0/10, this set offers excellent value compared to other Ideas sets.

Open a brick-built book on the evolution of STEM (science, technology, engineering and maths) with this LEGO® Ideas collectible display model for adults (21355). An inspiring science gift for women, men and history-lovers, the set features a buildable base in the shape of an open book topped by mini builds that represent historic innovations. Build an early car and a home computer, the NASA Voyager Probe with the Golden Record on board for any extraterrestrial life form that may find it, and much more. Turn the dial to make a 3D replica of a carbon atom float upwards and a DNA strand rotate.

The set includes LEGO minifigures of 3 famous scientists: Marie Curie (née Skłodowska), the first person ever to win 2 Nobel prizes; Sir Isaac Newton, famous for his law of universal gravitation; and pioneering agricultural scientist George Washington Carver.

Find building instructions in the box and on the LEGO Builder app to help you with every step of your rewarding, creative journey through the history of STEM. Contains 879 pieces.

Features

Science gift for women, men and history-lovers – Celebrate groundbreaking innovations in science, technology, engineering and maths with this collectible LEGO® Ideas The Evolution of STEM display model
LEGO® minifigures of 3 famous scientists – The “mother of modern physics” Marie Curie (née Skłodowska), Sir Isaac Newton, leader of the Scientific Revolution, and agricultural science pioneer George Washington Carver
Collectible display model for adults – A buildable base shaped like an open book is topped with many mini builds including Newton’s apple tree, Carver’s plants bed, a space shuttle and a robotic arm
Fun features – Turn the dial to make the 3D replica of a carbon atom float upwards and the DNA strand rotate, and look out for a Morse code message, NASA Voyager Probe with the Golden Record, and more
Gift for science-lovers and history buffs – Treat yourself or gift this LEGO® model kit to other adults with a passion for STEM subjects or history
A helping hand – Find building instructions on the LEGO® Builder app and in the box in a booklet that also features interviews with the set’s fan designer and LEGO Ideas designers
The LEGO® fans’ choice – This collectible building set for adults is part of a range of LEGO Ideas sets, each created by a fan designer, voted for by LEGO fans and produced by the LEGO Group
Science-themed home decor – This 879-piece LEGO® set measures over 27 cm (10.5 in.) high, 23 cm (9 in.) wide and 19 cm (7.5 in.) deep

Frequently Asked Questions about The Evolution of STEM

What is the best price for LEGO The Evolution of STEM (Set 21355)?

LEGO The Evolution of STEM (Set #21355) is currently priced at £69.99 on LEGO.com. We continuously monitor prices across multiple UK retailers to find you the best deals.

How many pieces are in LEGO set 21355?

LEGO The Evolution of STEM (Set #21355) contains 879 pieces. At the best available price of £70.00, that works out to approximately 8.0p per piece.

What age is LEGO The Evolution of STEM suitable for?

LEGO The Evolution of STEM (Set #21355) is recommended for ages 18+. This set is part of the LEGO Ideas theme. View all Ideas sets and deals.

Where can I find the building instructions for LEGO The Evolution of STEM?

You can download the official building instructions for LEGO The Evolution of STEM (Set #21355) 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 The Evolution of STEM in the UK?

LEGO The Evolution of STEM (Set #21355) is available from 1 UK retailer including argos_uk. Prices range from £70.00. It's also available directly from LEGO.com at £69.99.

What is the lowest price ever recorded for LEGO The Evolution of STEM?

The lowest price we've recorded for LEGO The Evolution of STEM (Set #21355) is £69.99 at LEGO.com in January 2026. That's 0% off the LEGO RRP of £69.99. Track the latest movements on our LEGO price history page.

Is LEGO The Evolution of STEM good value for money?

Comparing piece-count to price across the LEGO Ideas theme, this set scores 10.0 / 10 for value. That works out to about 8.0p per piece. That puts The Evolution of STEM in the top tier of Ideas 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.