The DIY birthday banner I started here was completed and
And was a success. 
I did add a heavier printed paper layer to each banner 
Piece. And a curly ribbon taped on the back of each
Banner piece with a longer dangling ribbon on 
each beginning and end of each word. 
I taped the beginning and ending of each word to
The window curtain.  
It was just what I envisioned. I got the idea from 
http://rainonatinroof.com/2013/05/diy-party-backdrop-tutorial-cheap-easy/