there are two ways: if it the rounded edges you can hand/machine applique onto background block or as Eleanor Burns has demonstrated in her DB book, use fusible lightweight interfacing sew it on, flip out and iron onto background, but if I remember correctly, she also h/m app down.....I guess you could do that with the pointed tips too, but simply sew the interfacing in a circle inside those tips......doesn't Kay Wood have a way to do them too? I, myself have made two and both times have machine app with invible thread........maybe one day will try EB's method.....