ALBUQUERQUE — For a brief moment — just a half-hour over the weekend — a simple piece of playground equipment served as a bridge between the United States and Mexico.

In images and videos that were circulating on social media this week, children smiled and giggled with glee as they bobbed up and down on three pink seesaws that had been inserted through the steel slats of a section of border wall in Sunland Park, N.M.

“Actions that take place on one side have a direct consequence on the other side,” Ronald Rael, one the architects who designed the border seesaws, wrote in an Instagram post describing the unusual installation.