I bought some vintage buttons on etsy (sorry, but I can’t remember what shop) to use for centers of fancy wool felt flowers.
Seems like I bought a few dozen of them, so I had spares. I have used flat back or non shank buttons to make hair pins for my nieces.
So I cut the shank off these buttons and used E6000 to glue the buttons to the hairpins! Very minimal cost and they are so cute!
I might be linking to some of these parties!