Animation is a great way to express almost anything. Be it fun or be it a serious message and the best part of it is that people notice animations better.
Pivot is one free tool which can let you create professional looking animation which can be converted into GIF image to be used any where you want.
If you have used any flash based animator, this is similar to those tools. You can create frame by frame recording of all the movements of characters and then play it. All stick figures will be flexible to draw and movements can be twisted as much you need them. Download Pivot