Punch Needle

So I came across this craft a while back. I bought a kit at Michaels, and thought it was the coolest thing. What you do is you punch the little pattern, with this special tool that you put some colored floss in and when you do that it creates this cool 3D effect. I remember I gave it a shot but didn't quite understand it. So I would like to go and revisit that craft and give it another shot.

Of course I was also thinking I could create my own pattern/character to punch needle once I got the hang of it. The picture above is the pattern I bought, I thought it looked cute, and I have been seeing online that people frame them and hang on the wall.