Wait Til You're Older concerns a twelve year old boy having a difficult time in his life. The boy has a severely strained relationship with his father, who he suspects might have had something to do with mother's death. The boy has a rich and detailed fantasy life in which he imagines himself as an adult. One day he meets a scientist who provides a secret elixir that grants the boy's wish. The catch is that he grows ten years every day. The grown boy learns important lessons about life during his time as an adult. ~ Perry Seibert, All Movie Guide