Creativity is a natural ability, but unfortunately it is often beaten out of us by our life experiences, as demonstrated in the story of Steven and the Bald Man:

Over time, we learn that many people do not want to hear our creative ideas and begin to fear that inner child. We muzzle and mute the part of us which is always ready to jump out and share our excitement and ideas with the world. But it is this inner child who is often at the center of truly great new ideas. So sometimes you have to let it out.

My suggestion: Bring a few people into your life who will embrace and encourage the inner child. These people will listen to your creative ideas, and even share an hour or two brainstorming with you.