Hape's Light & Sound Train Mountain Tunnel Set includes wooden tunnels with infrared-activated lights and sounds. Compatible with most railway sets, it offers multiple control options for interactive play. Made from sustainable wood and non-toxic finishes, this set encourages early learning and imaginative train adventures. Designed for children 3+, it stimulates sensory engagement and creativity while expanding existing train collections. The tunnels can be stacked or used separately for versatile play.# Pieces In Set: 4Number of Batteries: 2Recommended Ages: 3 Years And UpMeasurements: 9.45 Width/Inches, 5.91 Height/Inches, 11.81 Length/InchesBase Material: 100% PlasticBattery Size: AaCare: Wipe CleanCountry of Origin: Imported