- This LEGO® Hidden Side building toy combines the open creative play of LEGO building playsets with an app for an amazing single or multiplayer augmented reality (AR) play experience. Ideal for kids aged 7 and up.
- What’s in the box? A digitally interactive LEGO® Hidden Side haunted-tree model with fun features and functions, plus ghost-hunter Jack and possessed Axel Chops, Scrimper and Waylon minifigures.
- This haunted-tree model reveals an amazing digital world when viewed through a smart device equipped with the LEGO® Hidden Side AR app. Kids then get to hunt ghosts, solve mysteries and battle the boss ghost Lady E.
- Looking for a birthday or any-other-day gift for kids aged 7 and up? This LEGO® Hidden Side playset is a great gift idea for LEGO building fans and for kids who love virtual reality and digital games.
- When built, this LEGO® Welcome to The Hidden Side (70427) model measures over 6" (17cm) high, 8" (22cm) wide and 5" (13cm) deep.
- Battery-free building toy. The Hidden Side AR app is compatible with selected iOS and Android devices. Please check compatibility at www.LEGO.com/devicecheck. Children should ask parents' permission before going online.
- It's easy to get started with this LEGO® Hidden Side augmented reality, app-driven building kit. It comes with easy-to-follow instructions in the box and online – so simply open the brick bags and let the fun begin!
- The LEGO® Hidden Side universe is set in the fictional town of Newbury, where ghosts haunt people and buildings. The augmented reality play experience is constantly enhanced through new content, ghosts and events.
- LEGO® Hidden Side toy construction sets meet the highest industry standards and quality criteria to ensure that all LEGO bricks and pieces are consistent, compatible and connect and pull apart easily every time.
- At the LEGO group, we drop, heat, crush, twist and analyze our building bricks and pieces to make sure every playset meets the highest global safety and quality standards.
The Lego set Welcome to the Hidden Side with the set number 70427 is part of the LEGO Hidden Side theme and is recommended for ages 7+. It was released in January 2020. It includes 4 minifigures. The model has 189 pieces, and we estimate it takes around < 1 hour to build. It was designed by Niek van Slagmaat.105 Brickfact users have this set in their collection.
The set weighs about 0.380 kg. The box measures 10.3 x 7.5 x 2.4 in (26.2 x 19.1 x 6.1 cm). The recommended retail price is $19.99.
The Part-Out-Value (POV) is the sum of the average prices paid on bricklink.com for all parts of this set. It is about $32.15.
Lego 70427 product data
Set Information
Availability
Release
01/2020
Retiring Status
Retired (12/2020)
Price Information
RRP
$19.99
Insiders Points (for purchase at Lego)
130
Part Out Value
$32.15
Packaging
Weight
0.380 kg
Packaging dimensions
10.3 x 7.5 x 2.4 in
EAN (GTIN13)
5702016616088
Popularity with Brickfact users
- users have this set
- 105
- buyers in the last 12 months
- 10
105 Brickfact users have Welcome to the Hidden Side in their collection. 10 users bought it in the last 12 months.
Based on anonymized Brickfact user collections; shown only for sets with at least 10 users. As of October 31, 2026.
LEGO 70427 price trend
Average sale price on secondary marketplaces – not the new price at retailers.
- Current market value
- $19.59
- Growth vs. RRP
- −2.0 % $19.99
- Range
- $18.49 – $21.33
- Average
- $19.76
Loading price history…
Minifigures from 70427 Welcome to the Hidden Side
The Welcome to the Hidden Side set includes 4 different minifigures, 4 of which are unique to this set. The combined value of the minifigures is $8.66, which is ~43% of the RRP of this set.
x1
Jack Davids
Hidden Side
2020
#hs031
$2.06
i
Unique
x1
Axel Chops
Hidden Side
2020
#hs032
$2.49
Unique
x1
Scrimper
Hidden Side
2020
#hs033
$2.14
Unique
x1
Waylon
Hidden Side
2020
#hs034
$1.97
Unique
Official Set Description for LEGO 70427 Welcome to the Hidden Side
Fans of virtual reality and video games will love the amazing LEGO® Hidden Side universe, where physical and digital worlds merge in an incredible, single or multiplayer augmented reality (AR) experience. This Welcome to The Hidden Side (70427) ghost-hunting toy combines the open creative play of LEGO building toys with an app – so interaction with the model triggers events in the digital world.
Digitally interactive building toy for kids
This Welcome to the Hidden Side model reveals a ghostly world when viewed through a smart device equipped with the free LEGO AR app. Kids then get to hunt ghosts, battle the boss ghost Lady E and explore and solve mysteries, either alone or online with friends. And with 4 minifigures, there’s also room for imaginative role-play fun!
Welcome to the Hidden Side
The LEGO Hidden Side universe is set in the fictional town of Newbury, where ghosts haunt people and buildings. The augmented reality play experience is constantly enhanced through new content, ghosts and special events.
Building Instruction for LEGO 70427 Welcome to the Hidden Side
Part Lists for LEGO 70427 Welcome to the Hidden Side
LEGO 70427 Frequently Asked Questions
Is LEGO 70427 still available?
LEGO has retired 70427 Welcome to the Hidden Side, and no retailer in our price comparison currently sells it new. Its market value on secondary marketplaces is $19.59.
