I had to turn it down, for fear of another lack of creativity. So, it is time to jump on the bull, to risk being gored and my readers, if any, bored - by asking what are effective seeds for new perceptions. Perceptions cannot always be right. So we may expect to find seeds of both creation and disaster. This must be a central question for art, and the teaching of art.
Ink blots come to mind.
Following Hermann Rorschach, there is a vast literature on the variety of responses to ink blots related to normal and abnormal individual differences. But suppose, instead of comparing many people with a few ink blot patterns, we changed this around to look at different patterns with the same individuals. This should tell us which kinds of patterns can evoke creativity. Making ink blots was a children's game he would have known. He died before he was 40, at the point of recognition, from appendicitis complicated by peritonitis.