INTERACTIVE TRAIN SET – Toddlers embark on a stimulating learning journey with the LEGO DUPLO Interactive Adventure Train toy for 2+ year old boys and girls WHAT'S IN THE BOX? – Includes 4 DUPLO figures, a toy train that features lights and plays sounds, 3 destination builds and 14 LEGO train track pieces TODDLER LEARNING TOYS – With this building set, preschoolers use problem-solving skills to pack items and build toy train tracks to the station, park, or beach 3 INTERACTIVE DUPLO BRICKS – Great for use as a Montessori toy, the train set sparks kids' imaginations with lights and sounds; requires 4x AAA batteries (1.5V or 1.2V rechargeable, not included) GIFT FOR TODDLERS – This LEGO DUPLO construction toy makes a fun gift for 2+ year old boys and girls who like train sets and fun interactive toys INTERACTIVE APP – The free LEGO DUPLO Interactive Trains app lets kids record their own sounds and drive the train toy using a portable electronic device GREAT FOR MONTESSORI – LEGO DUPLO build-and-rebuild train toys are designed to develop toddlers’ patience, focus, perseverance and creative problem-solving skills