I believed that my stuffed animals were really complex, thoughtfull beings. I thought that when I left the room, and at night, they all partied.... So I would tell them things, and say to them "I know you can't talk back to me right now... But I know your'e listaning". -This I think in large part is owed to a series of childrens books called The Night The Toys Came To LIfe and The Veleveteen Rabbit.
Also believed in the monster under the bed. I would never sit with my legs hanggingover the bed, and would always run and leap on to it.... It was really awful when I fell short. Both because it was painful, and because I was right there, by the monster.