All aboard! Bring building fun to a new level with music, lights, and peek-a-boo, pop-up action. Baby can stack 4 character blocks on the train's building surfaces, then push it along to make them come to life as silly faces pop up and down. Music plays and lights dance when baby presses the smokestack! Requires 3 x AAA batteries (included). For ages 6 months to 3 years.