No, they aren't minifigs but these little dudes can be just as fun. With just a few bricks that most any Lego owner should have, you can make a block dude or two (or three or four or more!) and have fun posing them tons of different ways.
These guys are pretty simple to make and the pictures should explain it all but I'm including text in case anything isn't clear.
Check out Step 6 for a video tutorial.
To make a block dude, you will need:
-16 2x4 bricks
-10 2x2 bricks
-1 technic pin that is half tube, half cross-rod (see the second picture for a close-up)