This is what you will learn to do in this guide.
Supplies. The paper is so you can see the thread more easily.
Cut of a piece of thread. I used thread from a Criss Angel Magic Kit so I don't know if any kind of thread will work. Fish line might work but I haven't tried that yet.
Start unraveling the thread. If your using fish line, you can skip to Step 7.
Unravel it until you can barely see it.
Put a tiny piece of clay on one end of the thread.
Stick the clay to the card. Try to blend it in.
Wrap the thread around your finger and pretend that you're making the card float.
Amaze your friends and family.
If you find that regular thread isn't working or if you are just interested in learning more tricks than you may want to think about buying the whole magic kit. You can get it cheap on Amazon I think.
It is called the Criss Angel Mindfreak Platinum Magic Kit.