You have to be at least 48" tall. About 1/2 hour before the parade look for the red double decker bus along the parade route (it usually starts opposite to where the parade is going to be starting from either small world or the beginning of main street depending on which parade time ) There are cast members wearing blue overalls with clouds on them. Just walk up to them and tell them you'd like to be in the parade. If you get to them early enough there is still usually plenty of room. Good luck!