Excuse the messy desk. For this I used:
- crochet flowers (I used this pattern)
- elastic hairband
- glue gun
To fit the flowers you need to stretch the hairband around a book or something similar otherwise the spacing will be out when you put it on. I positioned the felt underneath.
Using the glue gun, put glue all over the back of the flower and place on the hairband/felt.
If I had thought about it more I'd cut felt circles and use them to back the flowers but that could be a bit harder to position quickly.
I wore mine for Halloween! Dress from Modcloth