The LEGO Duplo Rail Accessory Set offers toddlers unlimited possibilities to create a cool railway line for new or existing Duplo railway sets. From the level rail crossings, buffer stops, switches and various curved and straight rail segments, children can create so many different rail strands. Children of pre-school age will enthusiastically place the red functional stone on the rails and let every compatible Duplo train - for example the steam train or the freight train - stop when they reach this stone.