For my sister's birthday card, I had a go. Of course, I had to make things more complicated than a few lines....
|I drew an oriental lily free-hand and then sewed the holes in it|
|Some colouring pencil and thread, and that's it! :)|
I used 3 strands of embroidery floss.
And if you're wondering what it looks like on the inside- the answer is a bit of a mess! I didn't cover it up with another piece of paper. A bit sloppy, right? Maybe if I make another I'll refine my technique a little!