Get creative and use whatever you can find around the house, thrift store, or junkyard! For my robot, I used a water bottle lid, a metal candle tin with the wax removed, a pipe clamp, springs, knobs, parts from car adapters, and alligator clips.
Add a personalized touch:
I cut a heart out of a red plastic lid to make a personalized heart for my robot to hold.
I created a simple circuit with a 9volt battery (placed inside the body), LEDs for eyes with an on/off switch that doubles as the robot's antenna!
There are infinite possibilities for the robots you could make!