You will need some cards, glue, a hairclip, a needle and thread, scissors, and a button or two.
Cut lots of little teardrop shapes out of the cards. Arrange them in a flower shape and staple them together.
Sew the hairclip onto the back and also glue it in place for more stability.
Attach the button in the middle, and there you go. You're done and it's ready to wear!