Bright pink seesaws were placed between the U.S.-Mexico border wall in New Mexico Monday so that children from Mexico and the U.S. could play with each other. Two California professors, Ronald Rael and Virginia San Fratello, came up with the idea to develop a “Teetertotter Wall” between the border in 2009, according to Rael’s Instagram. The idea was meant to allow people to interact despite being separated by a wall. Rael shared the installation on Instagram Monday, stating that “the wall became a literal fulcrum for U.S. – Mexico relations.” The “Teetertotter Wall” is located between Sunland Park, New Mexico...