Step 7: Hang the thing.
Here's an example of how it works. This thing is so light you can hang it with your thumbtacks. Now, mine go through the two layers of cardboard by just a little, but it hasn't damaged the wall and it's far easier than jamming thumbtacks directly into the wall like I'm used to.
If yours comes out particularly well, feel free to show it! Also, if you have any questions feel free to comment and ask them.