Hello and Welcome to the board
How is your applique abilities ? I think that would be the best way to go ! Here is a train pattern :
http://www.fatcatpatterns.com/Toddler%20Designs.html
The tracks would just be black fabric in strips . Here is a church and some houses :
http://www.fatcatpatterns.com/Miscellany%20Designs.html
Good Luck and keep us posted