Anyone have any good DIY wedding ideas for table (6 ft banquet) centerpieces and favors? - summer wedding..?

I'm having a June wedding, and I would like some unique idea's for Reception table center pieces on a 6 ft banquet table, and for wedding favors for my guests. I'm trying to keep it as inexpensive as possible but still look good. My colors are red, black, and white. White table cloth, black plates, with red accents (napkins things like that). Our wedding is fairly casual, and we are getting married in the same hall as our reception, do our guests will be sitting at the tables while we are wed... I am pretty crafty so I would like to do this myself.. kind of home-made!! thanks all for your input or experience in this!!!!