Theo Jansen’s wind powered creatures are quite legendary. Thanks to the Mini Beest kit, you can bring one of these creatures home to play with it. ArduinoDeXXX has shared a guide that shows you how to improve your Mini Beest. You are going to need DC motors, Arduino Nano, infrared photo-transistor, and a few other components to get started.
This instructable piece covers some of the experiments you can do with your Beest.