We talk a lot about biomimicry in robotics, from shape to function. One of our favorites from the past year has been a spider-like robot that can be useful for disaster relief. We love what scientists can do and are oh so jealous that we aren't out building our own animal-like bots. So it was just our luck that a clever craftster came up with a spider-like four-legged robot that you can build yourself!
Here is the Instructable by Andrew Wright in full so you can follow along and make your own Arduino-based robot that will even wave hello to you.