I immediately connected to this idea presented in an interview with children's author/illustrator Mo Willems. He suggests that ideas are like seeds - some grow and some don't. No need for me to try to enhance his explanation. Mo is an intelligent, successful writer with a great sense of humor. I think you'll enjoy this 5 minute interview. http://www.cbsnews.com/videos/mo-willems-and-the-art-of-childrens-books/
In the mean time, keep nurturing those seeds!