With 20 pieces, the LEGO Train Tunnel and Tracks (10425) is a neat little set. It launched in 2025 under the Duplo banner at $19.99.
Price-per-piece sits at $0.999. Not the cheapest, but you're paying for the design and theme licensing.
For the price point, the Train Tunnel and Tracks delivers a clean Duplo build that's easy to recommend.
Key Features
20 pieces — Compact and purpose-built — great for a quick session
$0.999 per piece — Standard value for the Duplo range
Trains collection — Sought-after corner of the Duplo lineup
From 2025 — Modern LEGO design and packaging quality
Investment Analysis
The Train Tunnel and Tracks (10425) still has time on shelves, so don't feel pressured to jump in right away. The smart play with active sets is buying on discount and being patient. Let's break down the investment picture.
Investment-wise, we'd call this one modest but worth tracking.
The play here is patience. Set a price alert, grab it when it dips below $19.99, and revisit once it nears retirement. Duplo collectors tend to pay up.
Theme Background
As a 2025 addition to Duplo, part of the Trains subcollection, the Train Tunnel and Tracks slots into the more affordable side of Duplo. Duplo is part of LEGO's broader product lineup, and at $19.99 this set is priced accordingly. At $0.999 per piece, you're paying a premium — though that's typical for Duplo sets in this range.
Collectors following Duplo specifically should note the Trains subtheme — it's a category that tends to draw attention and hold value, especially as sets in this tier age out of production.
Why This Set Is Special
Strong part-out value at 1.9x. Parts are worth $37.81 vs $19.99 retail (1.9x ratio). Theme average is 1.5x.
Frequently Asked Questions
[{"q": "How many pieces are in the LEGO Train Tunnel and Tracks (10425)?", "a": "The LEGO Train Tunnel and Tracks (10425) contains 20 pieces, making it a smaller set."}, {"q": "How much does the LEGO Train Tunnel and Tracks (10425) cost?", "a": "The retail price (MSRP) for the LEGO Train Tunnel and Tracks (10425) is $19.99 in the United States. Regional pricing is \u00a317.99 in the UK, CA$24.99 in Canada, \u20ac19.99 in Europe. This works out to $1.00 per piece. While you get fewer pieces per dollar than some other Duplo sets, the build quality and specialized elements justify the premium."}, {"q": "Is the LEGO Train Tunnel and Tracks (10425) a good investment?", "a": "The LEGO Train Tunnel and Tracks (10425) shows moderate investment potential based on several factors. Duplo sets have historically been among the best-performing themes for post-retirement appreciation. As with any LEGO investment, buying at or below retail price maximizes potential returns. Use the BrickBucks price tracker to find the best entry point."}, {"q": "What age is the LEGO Train Tunnel and Tracks (10425) suitable for?", "a": "The LEGO Train Tunnel and Tracks (10425) is recommended for ages 2+. The build is designed to be approachable for younger builders while still providing an enjoyable experience."}, {"q": "How big is the LEGO Train Tunnel and Tracks (10425)?", "a": "The LEGO Train Tunnel and Tracks (10425) measures approximately 28.20cm \u00d7 26.20cm \u00d7 11.80cm (W\u00d7H\u00d7D) and weighs 0.70kg. It makes for a great display piece that won't take up too much shelf space."}, {"q": "When will the LEGO Train Tunnel and Tracks (10425) retire?", "a": "The LEGO Train Tunnel and Tracks (10425) is projected to retire around July 2027. Once a LEGO set retires, it is no longer produced or sold at retail. This typically causes prices to rise on the secondary market as supply decreases while collector demand remains. Check the retirement countdown on this page for the latest status."}, {"q": "Where can I buy the LEGO Train Tunnel and Tracks (10425)?", "a": "The LEGO Train Tunnel and Tracks (10425) is available from major retailers including Amazon, Walmart, Target, and LEGO.com. Use the BrickBucks deal tracker to find current discounts and the best price available right now."}]
