Kame is an open source small four-legged robot which is controlled by ESP8266 WiFi module. It has 8 servos with two motors per leg and a small LiPo battery. ESP8266 module is very cheap and this project could be ideal for a educational setting and various experiments.
Kame can walk:
Kame can jump:
Kame Thingiverse page with all the files:
Full FreeCAD files and code is also available at: