Toddlers take endless journeys of discovery with this interactive train set. They choose their holiday destination, then embark on a trip filled with lights, sounds and customizable fun. The free LEGO® DUPLO® Interactive Trains app extends the play, letting toddlers drive the train using a portable electronic device and gives families inspiration to create alternative destination builds. - Interactive train set sparks hours of creative play – Toddlers aged 2+ embark on a stimulating learning journey with the LEGO® DUPLO® Interactive Adventure Train preschool toy - Toddler playset packed with features – Building set includes 4 figures, a toy train that plays lights and sounds, 3 destination builds and 14 track pieces for creative building and customization - Train toy puts toddlers in the creative driving seat – Preschool kids use problem-solving skills to choose items to pack, then build a route for the passenger train to the station, park or beach - 3 interactive action bricks – This toy train stimulates little imaginations with lights and sounds. Uses 4x 1.5V AAA alkaline batteries (also works with 1.2V AAA rechargeable batteries), not included - Special occasion train playset gift idea – Delight a toddler who loves train toys with a special occasion gift of this feature-packed LEGO® DUPLO® construction set - Interactive app – The free LEGO® DUPLO® Interactive Trains app gives toddlers inspiration and lets them record their own sounds and drive the train using a portable electronic device - Educational toy that builds skills – LEGO® DUPLO® build-and-rebuild interactive train toys are expertly designed to develop toddlers’ creative problem-solving, patience, focus and perseverance skills - Dimensions – This 57-piece set includes a LEGO® DUPLO® train track that, when assembled in a loop, measures over 5 in. (13 cm) high, 27.5 in. (71 cm) wide and 22.5 in. (57 cm) deep