A sitcom centering on toddler Christopher Hapgood "Happy" Day and his parents. Happy's thoughts could be heard by the audience in the same way Bruce Willis' voice of the baby could be heard in "Look Who's Talking."
I thought I had dreamed this series up as a child until I saw that it existed on the IMDB. It was only on one season and featured the thoughts of a talking baby. Only the audience was in on the joke, the baby's parents had no idea he was aware of everything going on.