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“Train Tunnel and Tracks Expansion Set” is LEGO® “Trains” theme set number 10425. Released in 2025, it has 20 pieces. With Re:GO you can automatically work out what percentage of this set you can build from the LEGO parts you already own, along with the missing parts and an estimated cost. Use the links below to compare prices on Amazon, Rakuten, Yahoo! Shopping, Mercari and Yahoo! Auctions, and find the best deal on new, used, or individual parts.
Part breakdown 11 types
Color split (most first)
Light Bluish Gray×11
White×2
Yellowish Green×2
Bright Green×2
Reddish Orange×1
Dark Bluish Gray×1
Medium Lavender×1
Main parts (most used first)
6378 Duplo Train Track 4 x 8 Curved [Short]
Light Bluish Gray · ×10
35962pr0006 Duplo Train Action Plate with Lamp Print, Light Action
White · ×1
35967 Duplo Train Track, End of the Line Rail Stop
Reddish Orange · ×1
42025pr0005 Duplo Brick 1 x 3 x 2 Triangle with Train, Orange Border print
White · ×1
4785 Duplo Train Tracks, Ramp
Yellowish Green · ×1
51560 Duplo Train Track Switcher with Red Switch
Light Bluish Gray · ×1
5370 Duplo Train Track, Straight with 2 x 8 Plate on Both Sides
Re:GO is an unofficial service and is not affiliated with the LEGO Group. LEGO® is a trademark of the LEGO Group. Data is based on Rebrickable and others.