I found this project on a 'Great Ideas' post over at Tatertots and Jello - and it really is a fun idea. Since my oldest was about to turn 3, I hopped over to The Silly Pearl for instructions.
I used a hot glue gun to affix the blowers. I know Silly Pearl says not to because of the stringiness, but... I tried a couple other methods of glueing, and they didn't work. Fabri-Tac worked for the ribbons but not for the paper. Double-sided tape and Elmer's glue didn't work at all. (DST worked for the printed 'Happy Birthday' and the '#3s', but promptly fell off when the door started to open and close, so I took them off, and I think it looks just as good without them.)
Happy Birthday Sophie!
1 fat ribbon and one skinny ribbon, Michaels - from the sale bin
3 sheets scrapbooking paper, Michaels - $0.55 each
Items already owned:
Cardboard circle (cut out of an Amazon box)
Straws (originally from the Dollar Store)
Happy Birthday Hat (Party City? From last year)
Fabri-Tac, hot glue gun, Elmer's glue, rubber bands
Verdict: This project was a lot of fun, and really quick! I wish I had used a prettier background ribbon instead of a sale one, because it didn't occur to me that it would show so much.