This well made routine by JL Magic will give you shows a colorful and very impressive finish.  Start with a nice sized banner featuring a birthday cake, that on it's own is impressive looking.  In an instant, that banner changes to a much larger banner that says "HAPPY".  Happy what?  You ask!   In another easy move, another very large banner with the word "BIRTHDAY" appears.  Large banners are approximately 6 feet tall!