The below video link shows you how to make robotic arm from cardboard, especially to use to move a coca cola can.
Here are what you need:
- Cardboard,
- 8 syringes with rubber piston,
- Old battery,
- 4 pipes,
- Popsicle sticks,
- Glue,
- Water,
- an empty cola can,
- and patience.
Video Link:
How to Make Hydraulic Powered Robotic Arm from Cardboard