LEGO® DUPLO® Train Extension ToysRailway Bridge & Rails Expansion Set (10426) for a whole new play experience. This creative build-and-rebuild set lets toddlers add a high bridge to their 10427 and 10428 interactive LEGO® DUPLO® Town sets, sold separately. The straight rail segments can be built into any LEGO DUPLO train set to extend the railroad track. A buildable bridge and a functioning barrier are also included. Toddlers can let the technician wave the train through and practice their dexterity. And the action tile from this set makes the interactive trains from the 10427 and 10428 sets stop and make funny sounds. This educational toy promotes the development of toddlers. When children extend the railway line to make the train go over the bridge, they develop a new way to make the train go over the bridge.