DIY Train Tracks Small World made from a cardboard box. Plenty of room for lots of imagination here! Add a cereal box train station, cardboard tube tunnels and train tracks drawn with markers.
18 Small Worlds for Inspiring Creative, Imaginative Play from proves you don't have to have a huge area for Dramatic Play
The Imagination Tree: Farmyard Sensory Small World: Play:Create a small world play scene using real sensory elements to enrich the fun and learning experiences for young children!
Create a simple pond small world in this fun book activity for Denise Fleming's In the Small, Small Pond. Great sensory play for toddlers and preschoolers.
Kids can make more realistic yet fun trees for their toy train sets with this inexpensive DIY kids craft.
Travel/Transportation Themed Busy Bags Portable Small World: Pretend Model Train Set - Play Trains! I've done a train, a roadway, an ice age, a fairyland a farm theme for my kids.