Paint the bedroom walls a bright color, such as red or yellow, to set the backdrop for a train-inspired theme.
Decorate the walls with train signs with messages such as "railroad crossing" to give the space an authentic look.
Turn a wall shelf into a realistic-looking diorama using model trains. Glue mini trains, trees, tracks and a train station to the shelf and hang it on the bedroom wall as a whimsical touch.
Choose train-themed bedding. Make the bed the focal point of the bedroom by covering it with a comforter featuring vintage train designs. Enhance the bed with a decorative caboose-shaped pillow.
Complete the look with decorative and useful train-inspired lighting elements and textiles. Hang lantern-shaped wall sconces on either side of the bed for reading. Place a lamp featuring a train-shaped base and red shade on a nightstand or computer table. Add a soft touch to hardwood or tile floors with a train car-shaped rug.