The high school engineering class demonstrating their recent project, hydraulic robotic arms.
The teams had to design, build, and demonstrate a robotic arm capable of picking up a soda can, lifting it over an 8" high wall and setting it down in a determined location, all using hydraulics. The arm bases were clamped to the table so all movement had to be designed into the project.
All teams were successful in accomplishing the lift and movement, a few teams fell short of the destination.