I have been asked to do a tutorial, which I have never done before. I am hoping this makes sense to you and that you will give it a try.
You need to buy some Synthetic Fabric, you choice of color. I have always used a pretty plain fabric but you can use a printed as well. Just make sure it isn't too heavy.
You can use Nestabilities, sizzix or just cut cirlces. I use 3-4 different sizes. I usually use 2 or 3 of each size and layer them on top of each other. You don't have to be percise in lining them up, not every flower in the field is the same so yours don't have to be either.
Put your brad through the center, I used a hole punch for mine.
Then apply heat, with your heat gun. Start in the center with a circular motion and just keep going one layer at a time. The material will start to shrivel up. Keep the heat gun moving all the time so it doesn't burn the material.
You choose when to stop, after all it is your look and there is no right or wrong.
Have fun creating.