Dreams

My kid dreams about Micky Mouse and Dora the Explorer.  He wakes up in the middle of the night and yells for Micky Mouse! or Dora!  We have to settle him down and tell him they are sleeping and that he is okay before he will go back to sleep.  Now, does this mean he is watching too much of these cartoons or what?  Or should I just be grateful that his dreams are full of happy little cartoon characters and not scary ghosts or monsters.  I used to have terrible nightmares until I was a teenager.  I hope his subconscious can tell the different of what is real or not better than mine could.  I enjoy waking up with him in our bed right now as a baby but I don't want a teenager in our bed later on.