The music in "Into the Woods Jr." is an integral part of the play, with songs that are both catchy and meaningful. The score, written by Stephen Sondheim, features a range of styles, from ballads to upbeat ensemble numbers. The most iconic songs, such as "Into the Woods" and "If I Had a Child," showcase the characters' emotions and advance the plot. The music helps to create a sense of tension and urgency, particularly in the second act, as the characters face the consequences of their actions.