The set includes the roundabout, Maithwaite station, a tree, spinning cargo, and a ticket booth/gate. Each piece has a circular bottom that fits into the shapes on the roundabout grass. The cargo and tree can be switched as well as the station and ticket booth. This offers a child independence in play which is great for his/her imagination and self esteem.
Alex loved that he could successfully set everything up and move it around on his own. He quickly began a dialog with his new Thomas the tank engine train and then decided he wanted to add others of his in as well.
It's wonderful that Learning Curve knew that children want to build on their play experience and added in a way to easily do that.