So this is what you need. Plastic flowers, ribbon, pliers, aluminum wire and thin flower wire.
First make a circle around your head with the aluminum wire. Cut it and put the ends together.
Wrap the ribbon around the garland.
Pic the flowers you wish to use and separate them from each other.
Attach the flowers with the flower wire.
Something like this.
Keep putting in some more flowers until you're satisfied with the garland.
And then you're done!
Hope you like the guide, let me know what you think.