I just bought a lot of 12 x 12 scrapbook paper to use as "walls/floors" when taking pics of headbands, bows, etc.
Just prop them up on boxes with the left and right sides cut down to let in light. It will look just like a professional photo backdrop. Some backdrops sell for $80 or more, and 2' x 2' mini-backdrops can sell for $20 .
Joann's is having a 40% off sale on papercrafting supplies right now: http://www.joann.com/joann/home/home.jsp