Tree Carving

Children race into groves to carve unique symbols into trees. Later, blindfolded, they try to slap colored paint on their symbols. Points are awarded based on how many symbols they got, how fast, and painting someone elses symbol deducts points in reprimand.
Adults instead often do something called Whistling. They create whistling objects with unique sounds, launch them into the forest, and chase them blindfolded. This often results in minor injuries.