There is a simple tutorial on their site that will walk you through exactly how to download and install these fonts on your computer. Once the desired fonts are downloaded and installed, they will magically appear in several of your programs, including Photoshop, Word, and Paint. I was so amazed by how easy it was to put these fonts on my computer and use them. Way too cool!
Click here to check out the fonts! Here are a few that I've enjoyed playing around with:
Make sure you check out their terms if you are unsure of what constitutes 'personal use'.
A word of caution: If you use these fonts to replace the fonts that Blogger provides for use in your posts, they will only be visible to others who have these fonts installed on their computer. I suggest sticking to the basic fonts that everyone has when writing your posts.
Have fun! :)