All aboard! As the Smart Reader Engine (sold separately) approaches the BRIO Smart Track Station, a built-in "Smart" Track senses the train coming and sends a signal to the Smart Reader Engine to brake and come to a stop. Listen as sounds of a busy railway station pour out, and then at the sound of a train door closing, the Track Reader Engine starts up again. Connect BRIO original tracks to the Smart Track Station for unlimited interactive fun. All Smart Track products are compatible with the BRIO Wooden Railway System. Made of solid wood with realistic stone and brick detailing. Measures approximately 8.5" x 5" x 5".