Two California professors have installed seesaws across the US-Mexico border in a blunt rebuke to President Donald Trump over his plans to build a wall along the 3,219-kilometer boundary between the two countries.

The three pink seesaws were unveiled  Monday at a border fence separating Sunland Park, in New Mexico, the US, and Ciudad Juarez, in Mexico, allowing people on either side to play together. 

Ronald Rael, a professor of architecture at the University of California Berkeley who came up with the project with Virginia San Fratello, a professor of design at San Jose University, said the idea for "Teetertotter Wall" had been in the making for a decade.

He said seeing the project come to life was "one of the most incredible experiences" for him and Fratello, describing the event at the border as "filled with joy, excitement, and togetherness."

"The actions on one side have a direct consequence on the other," he added.

AFP