we made button wreaths earlier in the year..
I cant find the photos of mine right now but when I do I will send them through nicole
She hot-glued buttons to a cardboard donut shape backed with some decorative paper.
One made with vintage buttons. Adorable!
Basically you just glue buttons on to the shape. I started with flat, plain buttons and added the shaped and decorative ones on top as I filled in spaces. I used a small hot glue gun. I imagine craft glue or tacky glue would work, but would take longer to dry and work with. I glued a ribbon for hanging it on the back, then backed them both with white felt (I read that some other used decorative paper for backing).