I am looking for an illustrated children’s book about a being/person/creator/god/maybe child who creates the Earth and people (the people are each unique but also a part of him), he watches them and thinks it looks like fun so decides to come to Earth and join them but then he forgets he created it all. Purchased in the late 1980s, at a metaphysical book store, I believe it was considered a used children’s book. I loaned it out, it never got returned.