This was an early to mid 90's children's animated movie, it stats out at a parade . After the parade a boy and his sister come across an evil fair where there is an evil creepy guy with a glasss eye. He runs a fair or circus with monsters. I just had a flashback about this movie and must know the title

Maybe We're Back! A Dinosaur's Story: http://www.imdb.com/title/tt0108526/