Pinterest Link-Up

Does anybody know how to add a Pinterest button to your blog?  I googled it and tried a few different things from my phone with NO luck.  :-(  I plan on trying on my mom's computer whenever I get a chance, but I'm not sure when that will be.

So, I thought I would ask y'all! Anybody know? Anybody have any ideas or suggestions? Because I got nothing.

I would really like to link the two so that I can get more traffic to my blog and pin some of my DIYs to maybe help or inspire others.