Do you want the buttons? Here's how to put them on. (You might want to click on some of the pictures to enlarge.)
1) Click the design link on your blog.
2) Click the layout link on the left side of the screen.
3) On the "Blog Posts" area, click edit.
4) A pop-up window will appear. Check the Reactions box. Click edit if you want to change the reactions.
5) Put in your reactions, separated by commas. Click save.