Here is a great idea for a baby's first birthday banner (or a baby shower banner)! All I did was take some twine string and loop it through the arm holes of my baby's onesies and outfits from when she was a preemie/newborn. It was easy as pie!
Then I just added some small hand mittons using colored paper clips. It took me all of 10 minutes to get it put together and hung.
You could easily add anything onto this banner and make it longer or shorter. Other items you could use on the banner are:
Baby beanie hats
Pictures of baby throughout their first year
Footprints/handprints on paper
The possibilities are really endless. And if I'd had more time, you could also hook these items on using clothes pins (you could paint them any color to coordinate with other items), or diaper pins (like the ones for old cloth diapers).