You could make an animation for that. The stance it a bit weird, but it's by no means impossible. The simple look of the object kind of tells me that it would be best to have no knee joints. (which would be easier as well.) Try rotating each leg by a couple degrees in opposite directions for each frame and see what you get.
If that looks crappy, there are plenty of references on the internet that show the way a person walks in frames. Or you could picture yourself walking and make the frames from that.
And then there's other clickers' animations and the articles section.