Junie B. Jones The Musical JR. is a heartwarming show which follows a tremendously loveable girl as she learns “growing up is scary, but it’s also kinda fun.” There is a lot of humor in the strong and sassy way in which Junie B. addresses intimidating things like making new friends, finding her role, and taking risks. Join Junie B. on her first day of first grade, where many changes are in store.