Your search for "rail for mini mini train" revealed the following:

Tunnel Portal Concrete, Single Line, Gray, 2-Pack : Popopro, Pre-painted, Complete N (1:150) MS-003

Swiss Railways Staff: Preiser - Pre-Painted HO (1:87) 10087

Micropac Grass bushes - in the height of summer : Miniatures Nature Materials Non-scale 727-32m

Natsukashi no Michi - In the height of summer : Mini Nature Materials Non-scale 738-22

Old Prussian Railway Staff : Preiser - Finished product HO(1:87) 12130

Stone material R-stone ballast 1:80 (1.2 - 1.6 mm) Main line light grey: Morin material HO(1:80) 450

Micropac Roadside Flowers - In Bloom : Miniatures Nature Materials Non-scale 767-29m

Road Construction Fence 1 : Icom Pre-Painted Assembly Kit 1:144-N(1:150) EP-1

Wooden Door : Grant Line unpainted kit (parts) HO(1:87) 5058

Clyde and Dale's Barrel Factory: Woodland Pre-painted HO (1:87) 5026

[Model] Small/Micro ATS Note: Kobaru Equivalent: Sakatsu Unpainted Kit N (1:150) 3729

Wildflower Garden (Large) - Spring : Miniatures Nature Materials Non-scale 726-31

Child playing on slide, playground equipment and kick skater : Preiser Painted Finish HO(1:87) 10616

YSK Unpainted Kit N (1:150) Part No. 279

Cherry Blossom for Slope approx. 10cm : Kigusa Bunko finished product HO(1/80) SA4-B

Wildflowers in the garden - Summer is in full swing : Miniatures Nature Materials Non-scale 726-23

Small Animal Set : Preiser - Finished product set N (1:160) 79093

Grass along the road - Spring in bloom : Mini Nature Materials Non-scale 718-21

Stone-based material R-stone Ballast N (0.6-0.9 mm) Semi-trunk line Dark grey: Morin material N (1:150) 434

60 German Railway Employees in the 1950s: Preiser - Painted HO (1:87) 13004