This is a gift tag, but it could easily be adapted for a card. I see using either paper or fabric circles.
Activité de pâques
Blended butterfly cards blog
1.fold paper in half & draw diagonal 2. cut along diagonal...use 2 loose triangles to twist into vine 3. open symmetrical triangle and fold 4. leave if folded, twist paper vine or pipecleaner into middle 5. open and tape