LEGO® DUPLO 10425 Train Tunnel and Tracks Expansion Set

Current best price

LEGO 10425 is currently available from $12.81 incl. shipping at Amazon.com. 36% below RRP ($19.99). 3 retailers compared.

Updated November 2, 2026 at 10:01 PM EST

LEGO 10425 price comparison: where is it cheapest?

Prices incl. shipping to the US ·

Brickfact may earn a commission when you buy through a merchant link. Commissions do not determine the order of offers. How Brickfact compares prices

iFurther information
The Lego set Train Tunnel and Tracks Expansion Set with the set number 10425 is part of the LEGO DUPLO theme and is recommended for ages 2+. It was released in January 2025. The model has 20 pieces, and we estimate it takes around < 1 hour to build.
The set weighs about 0.661 kg. The box measures 28.2 x 26.2 x 11.8 cm. The recommended retail price is $19.99.
Our Brickfact Lego price comparison compares the prices of 3 shops for this set. It is currently cheapest at Amazon.com for $12.81 including shipping. That is $0.64 per piece. With this offer you save $7.18 off the recommended retail price, a discount of 36%.
If you buy the set from the official Lego store, you also earn 130 Insiders points. You can exchange them for vouchers for future purchases.
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 $25.32. You save around $12.51 if you buy the complete set at Amazon.com instead of the individual parts on bricklink.com. The current best offer therefore has a POV rate of 1.98: the Part-Out-Value divided by the current best price on Brickfact.

Lego 10425 product data

Set Information

Set ID
10425
Theme
Pieces
20
Building Time
< 1 hour
Age Range
2+

Availability

Release
01/2025
Retiring Status
Begin of Life (07/2027)

Price Information

RRP
$19.99
Insiders Points (for purchase at Lego)
130
Part Out Value
$25.32

Packaging

Weight
0.661 kg
EAN (GTIN13)
5702017583808

LEGO 10425 price history: how has the price changed?

Brickfact has been recording retailer prices since 10/12/2026. Best price so far: $19.80 (5 days ago).

Cheapest current offer in the comparison: Amazon.com at $12.81. Amazon offers are not part of the price history.

Current best price
$19.80 -1% vs. RRP
Best price since 10/12/2026
$19.80 -1% vs. RRP · 5 days ago

Daily lowest prices at the tracked shops, including shipping. Gaps indicate days with no recorded price. The table lists each shop’s lowest price.

Lowest price per retailer (since 10/12/2026)

Since 10/12/2026, Lego.com was the cheapest on 17 of 23 recorded days.

RetailerCurrentLowest priceDate
Walmart.com LogoWalmart.com$19.80$19.8011/03/26
Lego.com LogoLego.com$24.9411/03/26

Lowest price per day that Brickfact recorded at the retailers in the price comparison, including shipping where known – as in the comparison above. Amazon offers are not included in the price history.

LEGO 10425 market value

Average sale price on secondary marketplaces – not the new price at retailers.

Current market value
$15.03
Market value vs. RRP
−24.8 % $19.99
Range
$14.82 – $16.90
Average
$15.31

Loading price history…

Official Set Description for LEGO 10425 Train Tunnel and Tracks Expansion Set

Extend toddlers’ train adventures with the Train Tunnel and Tracks Expansion Set (10425) toy for toddlers. Preschool kids aged 2+ grow their learning adventures as they add a tunnel and extra track to their LEGO® DUPLO® Town interactive toy train sets (10427 and 10428, sold separately).

This creative building toy comes with a tunnel build and a 10-piece track, including a funnel element and a 2-way points switch so toddlers can change their train’s direction of travel. The action brick lights up the dark tunnel when activated by the interactive train from sets 10427 and 10428.

This kids’ learning toy encourages a toddler’s development. By extending the train track through the toy tunnel, preschoolers learn spatial awareness. Using problem-solving skills to combine the toy track and prediction skills to determine the train’s destination, toddlers develop patience and focus as they discover the many routes they can make.

  • Train track toy set – Toddlers aged 2+ extend their LEGO® DUPLO® railway adventures and learn development skills with the Train Tunnel and Tracks Expansion Set
  • Comes with lots of extra pieces to grow the fun – This creative building toy includes 10 track pieces, 1 action brick, a 2-way points piece and tunnel and funnel elements
  • Anytime gift idea – This extension set makes a fun treat for any toddler who loves to play with their LEGO® DUPLO® interactive toy train sets, sold separately
  • Quality toddler toys – All elements of this LEGO® DUPLO® toy have been tested to the max to ensure they fulfill demanding child safety standards
  • Track building that connects to toy train sets – Add this set to LEGO® DUPLO® Town interactive train sets (10427 and 10428) to create an even bigger learning journey for preschool kids
  • Skill-building playsets – LEGO® DUPLO® build-and-rebuild interactive train toys are designed to develop toddlers’ creative problem-solving, patience, focus and perseveranceskills
  • Dimensions – This 20-piece set includes a tunnel measuring over 7.5 in. (20 cm) high, 6.5 in. (16 cm) wide and 6 in. (15 cm) deep

Building Instruction for LEGO 10425 Train Tunnel and Tracks Expansion Set

LEGO 10425 Frequently Asked Questions

How much does LEGO 10425 Train Tunnel and Tracks Expansion Set cost?
The lowest price in the Brickfact price comparison is currently $12.81 incl. shipping at Amazon.com. That is 36% below the RRP of $19.99.
Where can I buy LEGO 10425 cheapest?
Brickfact compares 3 retailers. The cheapest offers: Amazon.com ($12.81), Walmart.com ($19.80), Lego.com ($24.94).
Is LEGO 10425 still available?
Yes. LEGO 10425 Train Tunnel and Tracks Expansion Set is currently available at 3 retailers in our price comparison.
When was LEGO 10425 cheapest?
Since tracking began on 10/12/2026, the lowest shop price recorded by Brickfact for LEGO 10425 was $19.80 on 10/29/2026 at Walmart.com, including shipping. Amazon prices are not included.

All LEGO DUPLO sets from 2025

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