For downloading the parts check the Thingiverse link (to the left)
This model is based on Eezybot: http://www.thingiverse.com/thing:1015238 but with some improvements. One is that the base of the robot uses a stepper motor instead of a servo. Other changes are the situation of the servos in the arm.
MG 90S servos (originals if possible) (3 units)
M3 screws and nuts (for the base you can also use M4)
Arduino Sensor Shield
This is the code I've used, but you can get you own code instead: https://github.com/rachuism/Programacion_brazo/blo