Very often there is a connection between what entertained us as a child and what entertains us now. Did you act out shows and little theatres as a child? Revisit your old passions as a child, now as an adult, in your writings. Draw on childhood experiences and memories. Here is where your creative genius kicks in. Can you visualize it? You can! Then write about it!
Never underestimate your inner creativity. There is so much inside, waiting to unfold and blossom. The possibilities are exhilarating!