Mardi Gras!! What is it??

What in the world is Mardi Gras and where did it come from?  Most people in the United States have heard of Mardi Gras but they don't know what it actually celebrates.  Is it a religious holiday and if so, which religion(s) influence  it?  You are about to explore where it is celebrated and the meanings and / or symbols that are included.  You will also compare and contrast a symbol of this event with other symbols celebrated within the United States.  So... Grab your de looms and March into this webquest.